diff --git a/pyproject.toml b/pyproject.toml
index f6dd6646..91fd6a21 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,6 +50,14 @@ dev = [
     "zstandard",
 ]
 
+[dependency-groups]
+dev = [
+    "pytest",
+    "pytest-asyncio",
+    "ruff>=0.12.2",
+    "zstandard",
+]
+
 
 [tool.uv]
 index-url = "https://pypi.tuna.tsinghua.edu.cn/simple"
diff --git a/pytests/utils_test/message_utils_test.py b/pytests/utils_test/message_utils_test.py
index 19ab8ac3..41d5aa0a 100644
--- a/pytests/utils_test/message_utils_test.py
+++ b/pytests/utils_test/message_utils_test.py
@@ -200,7 +200,7 @@ def dummy_number_to_short_id(original_id: int, salt: str, length: int = 6) -> st
     return "X" * length  # 返回固定的字符串，长度由参数决定，模拟生成短ID的行为
 
 
-def dummy_is_bot_self(user_id: str, platform) -> bool:
+def dummy_is_bot_self(platform, user_id: str) -> bool:
     return user_id == "bot_self"
 
 
diff --git a/pytests/utils_test/test_bot_identity_utils.py b/pytests/utils_test/test_bot_identity_utils.py
new file mode 100644
index 00000000..c345174b
--- /dev/null
+++ b/pytests/utils_test/test_bot_identity_utils.py
@@ -0,0 +1,227 @@
+from pathlib import Path
+from types import ModuleType, SimpleNamespace
+
+import importlib.util
+import sys
+
+
+class DummyLogger:
+    def __init__(self) -> None:
+        self.warning_messages: list[str] = []
+
+    def debug(self, _msg: str) -> None:
+        return
+
+    def info(self, _msg: str) -> None:
+        return
+
+    def warning(self, msg: str) -> None:
+        self.warning_messages.append(msg)
+
+    def error(self, _msg: str) -> None:
+        return
+
+
+def load_utils_module(monkeypatch, qq_account=123456, platforms=None):
+    logger = DummyLogger()
+    configured_platforms = platforms or []
+
+    def _stub_module(name: str) -> ModuleType:
+        module = ModuleType(name)
+        monkeypatch.setitem(sys.modules, name, module)
+        return module
+
+    for package_name in [
+        "src",
+        "src.chat",
+        "src.chat.message_receive",
+        "src.chat.utils",
+        "src.common",
+        "src.config",
+        "src.llm_models",
+        "src.person_info",
+    ]:
+        if package_name not in sys.modules:
+            package_module = ModuleType(package_name)
+            package_module.__path__ = []
+            monkeypatch.setitem(sys.modules, package_name, package_module)
+
+    jieba_module = ModuleType("jieba")
+    jieba_module.cut = lambda text: list(text)
+    monkeypatch.setitem(sys.modules, "jieba", jieba_module)
+
+    logger_module = _stub_module("src.common.logger")
+    logger_module.get_logger = lambda _name: logger
+
+    config_module = _stub_module("src.config.config")
+    config_module.global_config = SimpleNamespace(
+        bot=SimpleNamespace(
+            qq_account=qq_account,
+            platforms=configured_platforms,
+            nickname="MaiBot",
+            alias_names=[],
+        ),
+        chat=SimpleNamespace(
+            at_bot_inevitable_reply=1,
+            mentioned_bot_reply=1,
+        ),
+    )
+    config_module.model_config = SimpleNamespace()
+
+    message_module = _stub_module("src.chat.message_receive.message")
+
+    class SessionMessage:
+        pass
+
+    message_module.SessionMessage = SessionMessage
+
+    chat_manager_module = _stub_module("src.chat.message_receive.chat_manager")
+    chat_manager_module.chat_manager = SimpleNamespace(get_session_by_session_id=lambda _chat_id: None)
+
+    llm_module = _stub_module("src.llm_models.utils_model")
+
+    class LLMRequest:
+        def __init__(self, *args, **kwargs) -> None:
+            del args, kwargs
+
+    llm_module.LLMRequest = LLMRequest
+
+    person_module = _stub_module("src.person_info.person_info")
+
+    class Person:
+        pass
+
+    person_module.Person = Person
+
+    typo_generator_module = _stub_module("src.chat.utils.typo_generator")
+
+    class ChineseTypoGenerator:
+        def __init__(self, *args, **kwargs) -> None:
+            del args, kwargs
+
+        def create_typo_sentence(self, sentence: str):
+            return sentence, ""
+
+    typo_generator_module.ChineseTypoGenerator = ChineseTypoGenerator
+
+    file_path = Path(__file__).parent.parent.parent / "src" / "chat" / "utils" / "utils.py"
+    spec = importlib.util.spec_from_file_location("src.chat.utils.utils", file_path)
+    utils_module = importlib.util.module_from_spec(spec)
+    utils_module.__package__ = "src.chat.utils"
+    monkeypatch.setitem(sys.modules, "src.chat.utils.utils", utils_module)
+    assert spec.loader is not None
+    spec.loader.exec_module(utils_module)
+    return utils_module, logger
+
+
+def test_platform_specific_bot_accounts(monkeypatch):
+    utils_module, _logger = load_utils_module(
+        monkeypatch,
+        qq_account=123456,
+        platforms=[" TG : tg_bot ", "discord: disc_bot"],
+    )
+
+    assert utils_module.get_bot_account("qq") == "123456"
+    assert utils_module.get_bot_account("webui") == "123456"
+    assert utils_module.get_bot_account("telegram") == "tg_bot"
+    assert utils_module.get_bot_account("tg") == "tg_bot"
+    assert utils_module.get_bot_account("discord") == "disc_bot"
+
+    assert utils_module.is_bot_self("qq", "123456")
+    assert utils_module.is_bot_self("webui", "123456")
+    assert utils_module.is_bot_self("telegram", "tg_bot")
+    assert utils_module.is_bot_self(" TG ", "tg_bot")
+
+
+def test_get_all_bot_accounts_includes_runtime_aliases(monkeypatch):
+    utils_module, _logger = load_utils_module(
+        monkeypatch,
+        qq_account=123456,
+        platforms=["TG:tg_bot", "discord:disc_bot"],
+    )
+
+    assert utils_module.get_all_bot_accounts() == {
+        "qq": "123456",
+        "webui": "123456",
+        "telegram": "tg_bot",
+        "tg": "tg_bot",
+        "discord": "disc_bot",
+    }
+
+
+def test_get_all_bot_accounts_keeps_canonical_qq_identity(monkeypatch):
+    utils_module, _logger = load_utils_module(
+        monkeypatch,
+        qq_account=123456,
+        platforms=["qq:999999", "webui:888888", "TG:tg_bot"],
+    )
+
+    assert utils_module.get_all_bot_accounts()["qq"] == "123456"
+    assert utils_module.get_all_bot_accounts()["webui"] == "123456"
+
+
+def test_unknown_platform_no_longer_falls_back_to_qq(monkeypatch):
+    utils_module, logger = load_utils_module(monkeypatch, qq_account=123456, platforms=[])
+
+    assert utils_module.is_bot_self("unknown_platform", "123456") is False
+    assert logger.warning_messages
+    assert "unknown_platform" in logger.warning_messages[-1]
+
+
+def test_unknown_platform_warns_only_once(monkeypatch):
+    utils_module, logger = load_utils_module(monkeypatch, qq_account=123456, platforms=[])
+
+    assert utils_module.is_bot_self("unknown_platform", "first") is False
+    assert utils_module.is_bot_self(" unknown_platform ", "second") is False
+    assert len(logger.warning_messages) == 1
+
+
+def test_unconfigured_qq_account_disables_qq_and_webui_identity(monkeypatch):
+    utils_module, _logger = load_utils_module(monkeypatch, qq_account=0, platforms=["telegram:tg_bot"])
+
+    assert utils_module.get_bot_account("qq") == ""
+    assert utils_module.get_bot_account("webui") == ""
+    assert utils_module.is_bot_self("qq", "0") is False
+    assert utils_module.is_bot_self("webui", "0") is False
+
+
+def test_is_mentioned_bot_in_message_uses_platform_account(monkeypatch):
+    utils_module, _logger = load_utils_module(monkeypatch, qq_account=123456, platforms=["TG:tg_bot"])
+
+    message = SimpleNamespace(
+        processed_plain_text="@tg_bot 你好",
+        platform="telegram",
+        is_mentioned=False,
+        message_segment=None,
+        message_info=SimpleNamespace(
+            additional_config={},
+            user_info=SimpleNamespace(user_id="user_1"),
+        ),
+    )
+
+    is_mentioned, is_at, reply_probability = utils_module.is_mentioned_bot_in_message(message)
+
+    assert is_mentioned is True
+    assert is_at is True
+    assert reply_probability == 1.0
+
+
+def test_is_mentioned_bot_in_message_normalizes_qq_platform(monkeypatch):
+    utils_module, _logger = load_utils_module(monkeypatch, qq_account=123456, platforms=[])
+
+    message = SimpleNamespace(
+        processed_plain_text="@<MaiBot:123456> 你好",
+        platform=" QQ ",
+        is_mentioned=False,
+        message_segment=None,
+        message_info=SimpleNamespace(
+            additional_config={},
+            user_info=SimpleNamespace(user_id="user_1"),
+        ),
+    )
+
+    is_mentioned, is_at, reply_probability = utils_module.is_mentioned_bot_in_message(message)
+
+    assert is_mentioned is True
+    assert is_at is True
+    assert reply_probability == 1.0
diff --git a/src/bw_learner/expression_learner.py b/src/bw_learner/expression_learner.py
index ba94d231..43e4ee7d 100644
--- a/src/bw_learner/expression_learner.py
+++ b/src/bw_learner/expression_learner.py
@@ -14,8 +14,8 @@ from src.common.logger import get_logger
 from src.common.database.database_model import Expression
 from src.common.database.database import get_db_session
 from src.common.data_models.expression_data_model import MaiExpression
+from src.chat.utils.utils import is_bot_self
 from src.common.utils.utils_message import MessageUtils
-from src.common.utils.system_utils import is_bot_self
 
 from .expression_utils import check_expression_suitability, parse_expression_response
 
@@ -155,7 +155,7 @@ class ExpressionLearner:
 
         for i, msg in enumerate(self._messages_cache):
             # 跳过机器人自己的消息
-            if is_bot_self(msg.message_info.user_info.user_id, msg.platform):
+            if is_bot_self(msg.platform, msg.message_info.user_info.user_id):
                 continue
 
             # 获取消息文本
@@ -238,7 +238,7 @@ class ExpressionLearner:
 
             # 检查是否是机器人自己的消息
             target_msg = self._messages_cache[line_index]
-            if is_bot_self(target_msg.message_info.user_info.user_id, target_msg.platform):
+            if is_bot_self(target_msg.platform, target_msg.message_info.user_info.user_id):
                 logger.info(f"跳过引用机器人自身消息的黑话：content={content}, source_id={source_id}")
                 continue
 
@@ -298,7 +298,7 @@ class ExpressionLearner:
             # 当前行的原始消息
             current_msg = self._messages_cache[line_index]
             # 过滤掉从 bot 自己发言中提取到的表达方式
-            if is_bot_self(current_msg.message_info.user_info.user_id, current_msg.platform):
+            if is_bot_self(current_msg.platform, current_msg.message_info.user_info.user_id):
                 continue
             # 过滤掉无上下文的表达方式
             context = (current_msg.processed_plain_text or "").strip()
diff --git a/src/chat/brain_chat/PFC/message_sender.py b/src/chat/brain_chat/PFC/message_sender.py
index 10387319..ec5fb5ba 100644
--- a/src/chat/brain_chat/PFC/message_sender.py
+++ b/src/chat/brain_chat/PFC/message_sender.py
@@ -1,14 +1,16 @@
 import time
 from typing import Optional
-from src.common.logger import get_logger
+
 from maim_message import Seg
+from rich.traceback import install
 
 from src.common.data_models.mai_message_data_model import MaiMessage, UserInfo
 from src.chat.message_receive.chat_manager import BotChatSession
 from src.chat.message_receive.message import MessageSending
 from src.chat.message_receive.uni_message_sender import UniversalMessageSender
+from src.chat.utils.utils import get_bot_account
+from src.common.logger import get_logger
 from src.config.config import global_config
-from rich.traceback import install
 
 install(extra_lines=3)
 
@@ -40,8 +42,12 @@ class DirectMessageSender:
             segments = Seg(type="seglist", data=[Seg(type="text", data=content)])
 
             # 获取麦麦的信息
+            bot_user_id = get_bot_account(chat_stream.platform)
+            if not bot_user_id:
+                logger.error(f"[私聊][{self.private_name}]平台 {chat_stream.platform} 未配置机器人账号，无法发送消息")
+                raise RuntimeError(f"平台 {chat_stream.platform} 未配置机器人账号")
             bot_user_info = UserInfo(
-                user_id=global_config.bot.qq_account,
+                user_id=bot_user_id,
                 user_nickname=global_config.bot.nickname,
             )
 
diff --git a/src/chat/planner_actions/planner.py b/src/chat/planner_actions/planner.py
index a2ba4b9d..5184abcb 100644
--- a/src/chat/planner_actions/planner.py
+++ b/src/chat/planner_actions/planner.py
@@ -122,7 +122,11 @@ class ActionPlanner:
             msg_text = re.sub(pic_pattern, replace_pic_id, msg_text)
 
             # 替换用户引用格式：回复<aaa:bbb> 和 @<aaa:bbb>
-            platform = message.platform or "qq"
+            platform = message.platform or ""
+            if not platform:
+                logger.warning(
+                    f"{self.log_prefix}planner: message {message.message_id} has no platform set, bot-self detection will be skipped"
+                )
             msg_text = replace_user_references(msg_text, platform, replace_bot_name=True)
 
             # 替换单独的 <用户名:用户ID> 格式（replace_user_references 已处理回复<和@<格式）
@@ -135,7 +139,7 @@ class ActionPlanner:
                 user_id = user_match.group(2)
                 try:
                     # 检查是否是机器人自己
-                    if user_id == global_config.bot.qq_account:
+                    if is_bot_self(platform, str(user_id)):
                         return f"{global_config.bot.nickname}(你)"
                     person = Person(platform=platform, user_id=user_id)
                     return person.person_name or user_name
diff --git a/src/chat/replyer/group_generator.py b/src/chat/replyer/group_generator.py
index 22ea9228..74b324be 100644
--- a/src/chat/replyer/group_generator.py
+++ b/src/chat/replyer/group_generator.py
@@ -19,7 +19,7 @@ from src.chat.message_receive.message import SessionMessage
 from src.chat.message_receive.chat_manager import BotChatSession
 from src.chat.message_receive.uni_message_sender import UniversalMessageSender
 from src.chat.utils.timer_calculator import Timer  # <--- Import Timer
-from src.chat.utils.utils import get_chat_type_and_target_info, is_bot_self
+from src.chat.utils.utils import get_bot_account, get_chat_type_and_target_info, is_bot_self
 from src.prompt.prompt_manager import prompt_manager
 from src.services.message_service import (
     build_readable_messages,
@@ -1115,6 +1115,10 @@ class DefaultReplyer:
         anchor_message: Optional[MaiMessage] = None,
     ) -> SessionMessage:
         """构建单个发送消息"""
+        bot_user_id = get_bot_account(self.chat_stream.platform)
+        if not bot_user_id:
+            logger.error(f"平台 {self.chat_stream.platform} 未配置机器人账号，无法构建发送消息")
+            raise RuntimeError(f"平台 {self.chat_stream.platform} 未配置机器人账号")
 
         maim_message = MessageBase(
             message_info=BaseMessageInfo(
@@ -1122,7 +1126,7 @@ class DefaultReplyer:
                 message_id=message_id,
                 time=thinking_start_time,
                 user_info=MaimUserInfo(
-                    user_id=str(global_config.bot.qq_account),
+                    user_id=bot_user_id,
                     user_nickname=global_config.bot.nickname,
                 ),
                 additional_config={},
diff --git a/src/chat/replyer/private_generator.py b/src/chat/replyer/private_generator.py
index 3769dfd2..3b70bb2c 100644
--- a/src/chat/replyer/private_generator.py
+++ b/src/chat/replyer/private_generator.py
@@ -18,7 +18,7 @@ from src.chat.message_receive.message import SessionMessage
 from src.chat.message_receive.chat_manager import BotChatSession
 from src.chat.message_receive.uni_message_sender import UniversalMessageSender
 from src.chat.utils.timer_calculator import Timer
-from src.chat.utils.utils import get_chat_type_and_target_info, is_bot_self
+from src.chat.utils.utils import get_bot_account, get_chat_type_and_target_info, is_bot_self
 from src.prompt.prompt_manager import prompt_manager
 from src.chat.utils.common_utils import TempMethodsExpression
 from src.services.message_service import (
@@ -955,6 +955,10 @@ class PrivateReplyer:
         anchor_message: Optional[MaiMessage] = None,
     ) -> SessionMessage:
         """构建单个发送消息"""
+        bot_user_id = get_bot_account(self.chat_stream.platform)
+        if not bot_user_id:
+            logger.error(f"平台 {self.chat_stream.platform} 未配置机器人账号，无法构建发送消息")
+            raise RuntimeError(f"平台 {self.chat_stream.platform} 未配置机器人账号")
 
         maim_message = MessageBase(
             message_info=BaseMessageInfo(
@@ -962,7 +966,7 @@ class PrivateReplyer:
                 message_id=message_id,
                 time=thinking_start_time,
                 user_info=MaimUserInfo(
-                    user_id=str(global_config.bot.qq_account),
+                    user_id=bot_user_id,
                     user_nickname=global_config.bot.nickname,
                 ),
                 group_info=None,
diff --git a/src/chat/utils/statistic.py b/src/chat/utils/statistic.py
index ba3b5f7d..ede10a41 100644
--- a/src/chat/utils/statistic.py
+++ b/src/chat/utils/statistic.py
@@ -2106,12 +2106,7 @@ class StatisticOutputTask(AsyncTask):
         total_replies = [0] * len(time_points)
         total_online_hours = [0.0] * len(time_points)
 
-        # 获取bot的QQ账号
-        bot_qq_account = (
-            str(global_config.bot.qq_account)
-            if hasattr(global_config, "bot") and hasattr(global_config.bot, "qq_account")
-            else ""
-        )
+        from src.chat.utils.utils import is_bot_self
 
         interval_seconds = interval_hours * 3600
 
@@ -2148,7 +2143,7 @@ class StatisticOutputTask(AsyncTask):
             if 0 <= interval_index < len(time_points):
                 total_messages[interval_index] += 1
                 # 检查是否是bot发送的消息（回复）
-                if bot_qq_account and message.user_id == bot_qq_account:
+                if is_bot_self(message.platform or "", message.user_id or ""):
                     total_replies[interval_index] += 1
 
         # 查询在线时间记录
diff --git a/src/chat/utils/utils.py b/src/chat/utils/utils.py
index 8fe1cbef..07cec0b4 100644
--- a/src/chat/utils/utils.py
+++ b/src/chat/utils/utils.py
@@ -1,26 +1,29 @@
+from datetime import datetime
+from typing import TYPE_CHECKING, List, Optional, Tuple
+
+import ast
+import json
+import os
 import random
 import re
 import time
+
 import jieba
-import json
-import ast
-import os
-from datetime import datetime
-
-from typing import Optional, Tuple, List, TYPE_CHECKING
 
+from src.chat.message_receive.chat_manager import chat_manager as _chat_manager
+from src.chat.message_receive.message import SessionMessage
 from src.common.logger import get_logger
 from src.config.config import global_config, model_config
-from src.chat.message_receive.message import SessionMessage
-from src.chat.message_receive.chat_manager import chat_manager as _chat_manager
 from src.llm_models.utils_model import LLMRequest
 from src.person_info.person_info import Person
+
 from .typo_generator import ChineseTypoGenerator
 
 if TYPE_CHECKING:
     from src.common.data_models.info_data_model import TargetPersonInfo
 
 logger = get_logger("chat_utils")
+_warned_unconfigured_platforms: set[str] = set()
 
 
 def is_english_letter(char: str) -> bool:
@@ -37,33 +40,64 @@ def parse_platform_accounts(platforms: list[str]) -> dict[str, str]:
     Returns:
         字典，键为平台名，值为账号
     """
-    result = {}
+    result: dict[str, str] = {}
     for platform_entry in platforms:
         if ":" in platform_entry:
             platform_name, account = platform_entry.split(":", 1)
-            result[platform_name.strip()] = account.strip()
+            normalized_platform = platform_name.lower().strip()
+            account_str = account.strip()
+            if normalized_platform and account_str:
+                result[normalized_platform] = account_str
     return result
 
 
-def get_current_platform_account(platform: str, platform_accounts: dict[str, str], qq_account: str) -> str:
-    """根据当前平台获取对应的账号
+def _get_configured_qq_account() -> str:
+    qq_account = str(getattr(global_config.bot, "qq_account", "")).strip()
+    if qq_account in {"", "0"}:
+        return ""
+    return qq_account
 
-    Args:
-        platform: 当前消息的平台
-        platform_accounts: 从 platforms 列表解析的平台账号映射
-        qq_account: QQ 账号（兼容旧配置）
 
-    Returns:
-        当前平台对应的账号
-    """
-    if platform == "qq":
+def get_bot_account(platform: str) -> str:
+    """根据当前平台获取对应的机器人账号。"""
+    normalized_platform = str(platform or "").strip().lower()
+    if not normalized_platform:
+        return ""
+
+    qq_account = _get_configured_qq_account()
+    if normalized_platform in {"qq", "webui"}:
         return qq_account
-    elif platform == "telegram":
-        # 优先使用 tg，其次使用 telegram
+
+    platforms_list = getattr(global_config.bot, "platforms", []) or []
+    platform_accounts = parse_platform_accounts(platforms_list)
+    if normalized_platform in {"tg", "telegram"}:
         return platform_accounts.get("tg", "") or platform_accounts.get("telegram", "")
-    else:
-        # 其他平台直接使用平台名作为键
-        return platform_accounts.get(platform, "")
+
+    return platform_accounts.get(normalized_platform, "")
+
+
+def get_all_bot_accounts() -> dict[str, str]:
+    """获取所有已配置的机器人运行时身份。"""
+    bot_accounts: dict[str, str] = {}
+    qq_account = _get_configured_qq_account()
+    if qq_account:
+        bot_accounts["qq"] = qq_account
+        bot_accounts["webui"] = qq_account
+
+    platforms_list = getattr(global_config.bot, "platforms", []) or []
+    platform_accounts = parse_platform_accounts(platforms_list)
+
+    telegram_account = platform_accounts.get("tg", "") or platform_accounts.get("telegram", "")
+    if telegram_account:
+        bot_accounts["telegram"] = telegram_account
+        bot_accounts["tg"] = telegram_account
+
+    for platform_name, account in platform_accounts.items():
+        if platform_name in {"tg", "telegram", "qq", "webui"}:
+            continue
+        bot_accounts[platform_name] = account
+
+    return bot_accounts
 
 
 def is_bot_self(platform: str, user_id: str) -> bool:
@@ -78,53 +112,32 @@ def is_bot_self(platform: str, user_id: str) -> bool:
     Returns:
         bool: 如果是机器人自己则返回 True，否则返回 False
     """
-    if not platform or not user_id:
+    normalized_platform = str(platform or "").strip().lower()
+    if not normalized_platform or not user_id:
         return False
 
     # 将 user_id 转为字符串进行比较
-    user_id_str = str(user_id)
+    user_id_str = str(user_id).strip()
+    if not user_id_str:
+        return False
 
-    # 获取机器人的 QQ 账号（主账号）
-    qq_account = str(global_config.bot.qq_account or "")
+    bot_account = get_bot_account(normalized_platform)
+    if bot_account:
+        return user_id_str == bot_account
 
-    # QQ 平台：直接比较 QQ 账号
-    if platform == "qq":
-        return user_id_str == qq_account
-
-    # WebUI 平台：机器人回复时使用的是 QQ 账号，所以也比较 QQ 账号
-    if platform == "webui":
-        return user_id_str == qq_account
-
-    # 获取各平台账号映射
-    platforms_list = getattr(global_config.bot, "platforms", []) or []
-    platform_accounts = parse_platform_accounts(platforms_list)
-
-    # Telegram 平台
-    if platform == "telegram":
-        tg_account = platform_accounts.get("tg", "") or platform_accounts.get("telegram", "")
-        return user_id_str == tg_account if tg_account else False
-
-    # 其他平台：尝试从 platforms 配置中查找
-    platform_account = platform_accounts.get(platform, "")
-    if platform_account:
-        return user_id_str == platform_account
-
-    # 默认情况：与主 QQ 账号比较（兼容性）
-    return user_id_str == qq_account
+    if normalized_platform not in _warned_unconfigured_platforms:
+        _warned_unconfigured_platforms.add(normalized_platform)
+        logger.warning(f"平台 {normalized_platform} 未配置机器人账号，无法判断用户 {user_id_str} 是否为机器人自己")
+    return False
 
 
 def is_mentioned_bot_in_message(message: SessionMessage) -> tuple[bool, bool, float]:
     """检查消息是否提到了机器人（统一多平台实现）"""
     text = message.processed_plain_text or ""
-    platform = message.platform or ""
-
-    # 获取各平台账号
-    platforms_list = getattr(global_config.bot, "platforms", []) or []
-    platform_accounts = parse_platform_accounts(platforms_list)
-    qq_account = str(getattr(global_config.bot, "qq_account", "") or "")
+    platform = str(message.platform or "").strip().lower()
 
     # 获取当前平台对应的账号
-    current_account = get_current_platform_account(platform, platform_accounts, qq_account)
+    current_account = get_bot_account(platform)
 
     nickname = str(global_config.bot.nickname or "")
     alias_names = list(getattr(global_config.bot, "alias_names", []) or [])
diff --git a/src/common/message_repository.py b/src/common/message_repository.py
index a89b6f49..94d7bfea 100644
--- a/src/common/message_repository.py
+++ b/src/common/message_repository.py
@@ -1,17 +1,16 @@
-import traceback
 from datetime import datetime
 from typing import Any
 
 import json
+import traceback
 
-from sqlalchemy import func
+from sqlalchemy import and_, func, not_, or_
 from sqlmodel import col, select
 
+from src.chat.message_receive.message import SessionMessage
 from src.common.database.database import get_db_session
 from src.common.database.database_model import Messages
-from src.chat.message_receive.message import SessionMessage
 from src.common.logger import get_logger
-from src.config.config import global_config
 
 logger = get_logger(__name__)
 
@@ -163,7 +162,29 @@ def find_messages(
             after_time=after_time,
         )
         if filter_bot:
-            conditions.append(Messages.user_id != global_config.bot.qq_account)
+            from src.chat.utils.utils import get_all_bot_accounts, get_bot_account
+
+            bot_accounts = get_all_bot_accounts()
+            exclusion_conditions: list[Any] = []
+            if bot_accounts:
+                exclusion_conditions.append(
+                    or_(
+                        *[
+                            and_(Messages.platform == platform_name, Messages.user_id == account)
+                            for platform_name, account in bot_accounts.items()
+                        ]
+                    )
+                )
+
+            # 兼容旧数据：历史机器人消息在所有平台上都使用 QQ 账号作为 user_id 存储，
+            # 例如旧 Telegram bot 消息的 (platform="telegram", user_id=qq_account)。
+            # plan 建议的 ("", qq_account) pair 只能覆盖空 platform 行，无法覆盖这种情况。
+            # 因此这里使用全局 user_id 匹配作为临时方案，待 DB 迁移后应移除此兜底。
+            if qq_fallback := get_bot_account("qq"):
+                exclusion_conditions.append(Messages.user_id == qq_fallback)
+
+            if exclusion_conditions:
+                conditions.append(not_(or_(*exclusion_conditions)))
         if filter_command:
             conditions.append(Messages.is_command == False)  # noqa: E712
 
diff --git a/src/common/utils/system_utils.py b/src/common/utils/system_utils.py
index bfec3933..a5085f19 100644
--- a/src/common/utils/system_utils.py
+++ b/src/common/utils/system_utils.py
@@ -1,8 +1,11 @@
-# TODO: 这个函数的实现非常临时，后续需要替换为更完善的实现，比如直接从配置文件中读取机器人自己的 ID，或者通过 API 获取机器人自己的信息等
-def is_bot_self(user_id: str, platform: str) -> bool:
+# TODO: 这个包装层后续可以删除，统一直接使用 src.chat.utils.utils.is_bot_self
+# 注意：参数顺序已从旧版 (user_id, platform) 变更为 (platform, user_id)，与统一接口一致
+def is_bot_self(platform: str, user_id: str) -> bool:
     """
-    判断用户 ID 是否是机器人自己
+    判断用户 ID 是否是机器人自己。
 
-    临时方法，后续会替换为更完善的实现
+    当前仅保留兼容入口，真实实现委托给统一的多平台判断函数。
     """
-    return user_id == "bot_self" and platform == "test_platform"
+    from src.chat.utils.utils import is_bot_self as _is_bot_self
+
+    return _is_bot_self(platform, user_id)
diff --git a/src/common/utils/utils_message.py b/src/common/utils/utils_message.py
index cd46c37e..6b3b5f4e 100644
--- a/src/common/utils/utils_message.py
+++ b/src/common/utils/utils_message.py
@@ -367,7 +367,7 @@ class MessageUtils:
             anonymous_name = anonymize_mapping[msg_usr_info.user_id][0]
             new_message.message_info.user_info.user_nickname = anonymous_name
             new_message.message_info.user_info.user_cardname = anonymous_name
-        if replace_bot_name and target_bot_name and is_bot_self(msg_usr_info.user_id, platform):
+        if replace_bot_name and target_bot_name and is_bot_self(platform, msg_usr_info.user_id):
             new_message.message_info.user_info.user_nickname = target_bot_name
             new_message.message_info.user_info.user_cardname = target_bot_name
         return new_message
@@ -437,7 +437,7 @@ class MessageUtils:
             anonymous_name = anonymize_mapping[user_id][0]
             component.target_user_nickname = anonymous_name
             component.target_user_cardname = anonymous_name
-        if replace_bot_name and target_bot_name and is_bot_self(user_id, platform):
+        if replace_bot_name and target_bot_name and is_bot_self(platform, user_id):
             component.target_user_nickname = target_bot_name
             component.target_user_cardname = target_bot_name
         return component
@@ -473,7 +473,7 @@ class MessageUtils:
                 anonymous_name = anonymize_mapping[user_id][0]
                 comp.user_nickname = anonymous_name
                 comp.user_cardname = anonymous_name
-            if replace_bot_name and target_bot_name and is_bot_self(user_id, platform):
+            if replace_bot_name and target_bot_name and is_bot_self(platform, user_id):
                 comp.user_nickname = target_bot_name
                 comp.user_cardname = target_bot_name
             comp.content = [  # 递归处理转发消息中的组件
@@ -512,7 +512,7 @@ class MessageUtils:
                 anonymous_name = anonymize_mapping[user_id][0]
                 component.target_message_sender_nickname = anonymous_name
                 component.target_message_sender_cardname = anonymous_name
-            if replace_bot_name and target_bot_name and is_bot_self(user_id, platform):
+            if replace_bot_name and target_bot_name and is_bot_self(platform, user_id):
                 component.target_message_sender_nickname = target_bot_name
                 component.target_message_sender_cardname = target_bot_name
         else:
diff --git a/src/person_info/person_info.py b/src/person_info/person_info.py
index 7f80f496..799f56a0 100644
--- a/src/person_info/person_info.py
+++ b/src/person_info/person_info.py
@@ -256,43 +256,9 @@ class Person:
         Returns:
             bool: 如果是机器人自己则返回 True，否则返回 False
         """
-        if not platform or not user_id:
-            return False
+        from src.chat.utils.utils import is_bot_self
 
-        # 将 user_id 转为字符串进行比较
-        user_id_str = str(user_id)
-
-        # 获取机器人的 QQ 账号（主账号）
-        qq_account = str(global_config.bot.qq_account or "")
-
-        # QQ 平台：直接比较 QQ 账号
-        if platform == "qq":
-            return user_id_str == qq_account
-
-        # WebUI 平台：机器人回复时使用的是 QQ 账号，所以也比较 QQ 账号
-        if platform == "webui":
-            return user_id_str == qq_account
-
-        # 获取各平台账号映射
-        platforms_list = getattr(global_config.bot, "platforms", []) or []
-        platform_accounts = {}
-        for platform_entry in platforms_list:
-            if ":" in platform_entry:
-                platform_name, account = platform_entry.split(":", 1)
-                platform_accounts[platform_name.strip()] = account.strip()
-
-        # Telegram 平台
-        if platform == "telegram":
-            tg_account = platform_accounts.get("tg", "") or platform_accounts.get("telegram", "")
-            return user_id_str == tg_account if tg_account else False
-
-        # 其他平台：尝试从 platforms 配置中查找
-        platform_account = platform_accounts.get(platform, "")
-        if platform_account:
-            return user_id_str == platform_account
-
-        # 默认情况：与主 QQ 账号比较（兼容性）
-        return user_id_str == qq_account
+        return is_bot_self(platform, user_id)
 
     def __init__(self, platform: str = "", user_id: str = "", person_id: str = "", person_name: str = ""):
         # 使用统一的机器人识别函数（支持多平台，包括 WebUI）
@@ -731,15 +697,15 @@ class PersonInfoManager:
             bot_name = global_config.bot.nickname
 
             qv_name_prompt = f"你是{bot_name}，一个伪装成人类的AI，你不能让别人发现这一点，"
-            qv_name_prompt += f"现在你想给一个用户取一个昵称，用户的qq昵称是{user_nickname}，"
-            qv_name_prompt += f"用户的qq群昵称名是{user_cardname}，"
+            qv_name_prompt += f"现在你想给一个用户取一个昵称，用户的昵称是{user_nickname}，"
+            qv_name_prompt += f"用户的群昵称名是{user_cardname}，"
             if user_avatar:
-                qv_name_prompt += f"用户的qq头像是{user_avatar}，"
+                qv_name_prompt += f"用户的头像是{user_avatar}，"
             if old_name:
                 qv_name_prompt += f"你之前叫他{old_name}，是因为{old_reason}，"
 
             qv_name_prompt += f"\n其他取名的要求是：{request}，不要太浮夸，简短，"
-            qv_name_prompt += "\n请根据以上用户信息，想想你叫他什么比较好，不要太浮夸，请最好使用用户的qq昵称或群昵称原文，可以稍作修改，优先使用原文。优先使用用户的qq昵称或者群昵称原文。"
+            qv_name_prompt += "\n请根据以上用户信息，想想你叫他什么比较好，不要太浮夸，请最好使用用户的昵称或群昵称原文，可以稍作修改，优先使用原文。优先使用用户的昵称或者群昵称原文。"
 
             if existing_names_str:
                 qv_name_prompt += f"\n请注意，以下名称已被你尝试过或已知存在，请避免：{existing_names_str}。\n"
diff --git a/src/services/send_service.py b/src/services/send_service.py
index c6885658..7af55716 100644
--- a/src/services/send_service.py
+++ b/src/services/send_service.py
@@ -4,15 +4,17 @@
 提供发送各种类型消息的核心功能。
 """
 
+from typing import Dict, List, Optional, TYPE_CHECKING
+
 import time
 import traceback
-from typing import Dict, List, Optional, TYPE_CHECKING
 
 from maim_message import BaseMessageInfo, GroupInfo as MaimGroupInfo, MessageBase, Seg, UserInfo as MaimUserInfo
 
 from src.chat.message_receive.chat_manager import chat_manager as _chat_manager
 from src.chat.message_receive.message import SessionMessage
 from src.chat.message_receive.uni_message_sender import UniversalMessageSender
+from src.chat.utils.utils import get_bot_account
 from src.common.data_models.mai_message_data_model import MaiMessage
 from src.common.data_models.message_component_data_model import DictComponent, MessageSequence
 from src.common.logger import get_logger
@@ -81,6 +83,10 @@ async def _send_to_target(
         additional_config: dict[str, object] = {}
         if selected_expressions is not None:
             additional_config["selected_expressions"] = selected_expressions
+        bot_user_id = get_bot_account(target_stream.platform)
+        if not bot_user_id:
+            logger.error(f"[SendService] 平台 {target_stream.platform} 未配置机器人账号，无法发送消息")
+            return False
 
         maim_message = MessageBase(
             message_info=BaseMessageInfo(
@@ -88,7 +94,7 @@ async def _send_to_target(
                 message_id=message_id,
                 time=current_time,
                 user_info=MaimUserInfo(
-                    user_id=str(global_config.bot.qq_account),
+                    user_id=bot_user_id,
                     user_nickname=global_config.bot.nickname,
                     platform=target_stream.platform,
                 ),
diff --git a/src/webui/routers/chat/support.py b/src/webui/routers/chat/support.py
index 507abcf5..d9afa474 100644
--- a/src/webui/routers/chat/support.py
+++ b/src/webui/routers/chat/support.py
@@ -11,11 +11,11 @@ from sqlmodel import col, delete, select
 
 from src.chat.message_receive.bot import chat_bot
 from src.chat.message_receive.message import SessionMessage
+from src.chat.utils.utils import is_bot_self
 from src.common.database.database import get_db_session
 from src.common.database.database_model import Messages, PersonInfo
 from src.common.logger import get_logger
 from src.common.message_repository import find_messages
-from src.common.utils.system_utils import is_bot_self
 from src.common.utils.utils_session import SessionUtils
 from src.config.config import global_config
 from src.webui.core import get_token_manager
@@ -62,12 +62,7 @@ class ChatHistoryManager:
     def _message_to_dict(self, msg: SessionMessage, group_id: Optional[str] = None) -> dict[str, Any]:
         user_info = msg.message_info.user_info
         user_id = user_info.user_id or ""
-        is_bot = is_bot_self(user_id, msg.platform)
-
-        if not is_bot and group_id and group_id.startswith(VIRTUAL_GROUP_ID_PREFIX):
-            is_bot = user_id == str(global_config.bot.qq_account)
-        elif not is_bot:
-            is_bot = not user_id.startswith(WEBUI_USER_ID_PREFIX)
+        is_bot = is_bot_self(msg.platform, user_id)
 
         return {
             "id": msg.message_id,
@@ -611,4 +606,4 @@ async def dispatch_chat_event(
         )
         return current_user_name, next_virtual_config
 
-    return current_user_name, current_virtual_config
\ No newline at end of file
+    return current_user_name, current_virtual_config