diff --git a/app/agent/tools/impl/_filter_rule_utils.py b/app/agent/tools/impl/_filter_rule_utils.py
index b3eacab8c..ef4a00bfc 100644
--- a/app/agent/tools/impl/_filter_rule_utils.py
+++ b/app/agent/tools/impl/_filter_rule_utils.py
@@ -2,11 +2,16 @@
 
 import copy
 import re
-from typing import Any, Dict, Iterable, Optional
+from typing import Any, Callable, Dict, Iterable, Optional
 
 from app.application.agentdata import get_agent_subscribe_port
 from app.application.configuration import get_configured_system_config
-from app.application.rules import BUILTIN_RULE_SET, RuleHelper, RuleParser
+from app.application.rules import (
+    BUILTIN_RULE_SET,
+    RuleHelper,
+    RuleParser,
+    replace_group_name_in_list,
+)
 from app.runtime.events import eventmanager
 from app.schemas.event import ConfigChangeEventData
 from app.schemas.rule import CustomRule
@@ -430,17 +435,94 @@ async def save_system_config(
 
     success = await get_configured_system_config().async_set(key, normalized_value)
     if success:
-        await eventmanager.async_send_event(
-            etype=EventType.ConfigChanged,
-            data=ConfigChangeEventData(
-                key=key,
-                value=normalized_value,
-                change_type="update",
-            ),
-        )
+        await _publish_rule_config_changed(key, normalized_value)
     return success
 
 
+async def _publish_rule_config_changed(
+    key: SystemConfigKey,
+    value: Any,
+) -> None:
+    """广播一项已经提交的规则配置变更。"""
+    await eventmanager.async_send_event(
+        etype=EventType.ConfigChanged,
+        data=ConfigChangeEventData(
+            key=key,
+            value=value,
+            change_type="update",
+        ),
+    )
+
+
+async def _rewrite_rule_group_references(
+    map_names: Callable[[Iterable[str]], list[str]],
+) -> dict:
+    """按名称映射器更新全局、默认订阅配置和已有订阅引用。"""
+    changed = {
+        "global_settings": {},
+        "subscribes": [],
+    }
+    system_config = get_configured_system_config()
+    for config_key in (
+        SystemConfigKey.SearchFilterRuleGroups,
+        SystemConfigKey.SubscribeFilterRuleGroups,
+        SystemConfigKey.BestVersionFilterRuleGroups,
+    ):
+        original = system_config.get(config_key) or []
+        updated = map_names(original)
+        if updated != original:
+            await save_system_config(config_key, updated)
+            changed["global_settings"][config_key.value] = updated
+
+    for config_key in (
+        SystemConfigKey.DefaultMovieSubscribeConfig,
+        SystemConfigKey.DefaultTvSubscribeConfig,
+        SystemConfigKey.DefaultMusicSubscribeConfig,
+    ):
+        original = system_config.get(config_key) or {}
+        original_groups = original.get("filter_groups") or []
+        updated_groups = map_names(original_groups)
+        if updated_groups == original_groups:
+            continue
+        updated = copy.deepcopy(original)
+        updated["filter_groups"] = updated_groups
+        await save_system_config(config_key, updated)
+        changed["global_settings"][config_key.value] = updated
+
+    subscribe_port = get_agent_subscribe_port()
+    subscribes = await subscribe_port.async_list()
+    for subscribe in subscribes:
+        original = subscribe.filter_groups or []
+        updated = map_names(original)
+        if updated == original:
+            continue
+        await subscribe_port.async_update_filter_groups(subscribe.id, updated)
+        changed["subscribes"].append(
+            {
+                "subscribe_id": subscribe.id,
+                "name": subscribe.name,
+                "season": subscribe.season,
+                "filter_groups": updated,
+            }
+        )
+
+    return changed
+
+
+async def rename_rule_group_references(old_name: str, new_name: str) -> dict:
+    """规则组改名后，联动更新全部配置和已有订阅引用。"""
+    return await _rewrite_rule_group_references(
+        lambda values: replace_group_name_in_list(values, old_name, new_name)
+    )
+
+
+async def remove_rule_group_references(group_name: str) -> dict:
+    """删除规则组后，清理全部配置和已有订阅中的悬空引用。"""
+    return await _rewrite_rule_group_references(
+        lambda values: [value for value in values or [] if value != group_name]
+    )
+
+
 def replace_rule_id_in_rule_string(
     rule_string: str, old_rule_id: str, new_rule_id: str
 ) -> str:
@@ -449,91 +531,3 @@ def replace_rule_id_in_rule_string(
         rf"(?<![A-Za-z0-9]){re.escape(old_rule_id)}(?![A-Za-z0-9])"
     )
     return pattern.sub(new_rule_id, rule_string)
-
-
-def replace_group_name_in_list(
-    values: Optional[Iterable[str]], old_name: str, new_name: str
-) -> list[str]:
-    """更新配置里的规则组名引用，并顺手去重。"""
-    result = []
-    for value in values or []:
-        mapped = new_name if value == old_name else value
-        if mapped not in result:
-            result.append(mapped)
-    return result
-
-
-async def rename_rule_group_references(old_name: str, new_name: str) -> dict:
-    """规则组改名后，联动更新全局设置和订阅引用。"""
-    changed = {
-        "global_settings": {},
-        "subscribes": [],
-    }
-
-    for config_key in (
-        SystemConfigKey.SearchFilterRuleGroups,
-        SystemConfigKey.SubscribeFilterRuleGroups,
-        SystemConfigKey.BestVersionFilterRuleGroups,
-    ):
-        original = get_configured_system_config().get(config_key) or []
-        updated = replace_group_name_in_list(original, old_name, new_name)
-        if updated != original:
-            await save_system_config(config_key, updated)
-            changed["global_settings"][config_key.value] = updated
-
-    subscribe_oper = get_agent_subscribe_port()
-    subscribes = await subscribe_oper.async_list()
-    for subscribe in subscribes:
-        original = subscribe.filter_groups or []
-        updated = replace_group_name_in_list(original, old_name, new_name)
-        if updated == original:
-            continue
-        await subscribe_oper.async_update_filter_groups(subscribe.id, updated)
-        changed["subscribes"].append(
-            {
-                "subscribe_id": subscribe.id,
-                "name": subscribe.name,
-                "season": subscribe.season,
-                "filter_groups": updated,
-            }
-        )
-
-    return changed
-
-
-async def remove_rule_group_references(group_name: str) -> dict:
-    """删除规则组后，清理全局设置和订阅里的悬空引用。"""
-    changed = {
-        "global_settings": {},
-        "subscribes": [],
-    }
-
-    for config_key in (
-        SystemConfigKey.SearchFilterRuleGroups,
-        SystemConfigKey.SubscribeFilterRuleGroups,
-        SystemConfigKey.BestVersionFilterRuleGroups,
-    ):
-        original = get_configured_system_config().get(config_key) or []
-        updated = [value for value in original if value != group_name]
-        if updated != original:
-            await save_system_config(config_key, updated)
-            changed["global_settings"][config_key.value] = updated
-
-    subscribe_oper = get_agent_subscribe_port()
-    subscribes = await subscribe_oper.async_list()
-    for subscribe in subscribes:
-        original = subscribe.filter_groups or []
-        updated = [value for value in original if value != group_name]
-        if updated == original:
-            continue
-        await subscribe_oper.async_update_filter_groups(subscribe.id, updated)
-        changed["subscribes"].append(
-            {
-                "subscribe_id": subscribe.id,
-                "name": subscribe.name,
-                "season": subscribe.season,
-                "filter_groups": updated,
-            }
-        )
-
-    return changed
diff --git a/app/api/endpoints/system.py b/app/api/endpoints/system.py
index b6ebe63ca..4fcd33272 100644
--- a/app/api/endpoints/system.py
+++ b/app/api/endpoints/system.py
@@ -1192,7 +1192,10 @@ async def set_setting(
         try:
             with plugin_system_config_mutation(key):
                 success = await get_configured_system_config().async_set(key, value)
-                if success:
+                if success or (
+                    success is None
+                    and key == SystemConfigKey.UserFilterRuleGroups.value
+                ):
                     # 发送配置变更事件
                     await eventmanager.async_send_event(
                         etype=EventType.ConfigChanged,
diff --git a/app/application/rules.py b/app/application/rules.py
index 16b6656b9..46c1d4621 100644
--- a/app/application/rules.py
+++ b/app/application/rules.py
@@ -4,6 +4,7 @@
 """
 
 import threading
+from collections.abc import Iterable
 from typing import Dict, List, Optional
 
 from pyparsing import (
@@ -85,6 +86,20 @@ class RuleHelper:
         )
 
 
+def replace_group_name_in_list(
+    values: Optional[Iterable[str]],
+    old_name: str,
+    new_name: str,
+) -> list[str]:
+    """更新配置里的规则组名引用，并顺手去重。"""
+    result = []
+    for value in values or []:
+        mapped = new_name if value == old_name else value
+        if mapped not in result:
+            result.append(mapped)
+    return result
+
+
 # 内置规则只在这里维护一份，便于过滤模块和 Agent 工具共享同一套事实来源。
 BUILTIN_RULE_SET: Dict[str, dict] = {
     # 蓝光原盘
diff --git a/app/chain/subscribe.py b/app/chain/subscribe.py
index 281e648cc..8dd138066 100644
--- a/app/chain/subscribe.py
+++ b/app/chain/subscribe.py
@@ -103,6 +103,24 @@ else:
             """返回快照字段，兼容整理链的响应转换。"""
             return dict(self.__dict__)
 
+
+def _rule_group_names(rule_groups: Optional[List[Any]]) -> set[str]:
+    """从规则组持久化字典中提取非空名称。"""
+    return {
+        str(group.get("name")).strip()
+        for group in rule_groups or []
+        if isinstance(group, dict) and group.get("name")
+    }
+
+
+def _retain_rule_group_names(
+    values: Optional[List[str]],
+    valid_names: set[str],
+) -> List[str]:
+    """按当前规则组定义保留有效引用，并维持原有顺序。"""
+    return [value for value in values or [] if value in valid_names]
+
+
 @dataclass(frozen=True, slots=True)
 class _SubscribePostCommitContext:
     """订阅提交后副作用所需的不可变业务快照。"""
@@ -1212,6 +1230,13 @@ class SubscribeChain(MusicSubscribeMixin, InteractionChainMixin, ChainBase):
                 ]
             else:
                 subscribes = subscribeoper.list(self.get_states_for_search(state))
+            self._reconcile_rule_group_references(
+                valid_names=_rule_group_names(
+                    _system_config().get(SystemConfigKey.UserFilterRuleGroups)
+                ),
+                subscribeoper=subscribeoper,
+                subscribes=subscribes,
+            )
             total_num = len(subscribes)
             processed_subscribes = []
             # 搜索链在整个订阅循环内复用，避免每轮订阅重复执行链初始化
@@ -3021,6 +3046,69 @@ class SubscribeChain(MusicSubscribeMixin, InteractionChainMixin, ChainBase):
                 "sites": sites
             })
 
+    @eventmanager.register(EventType.ConfigChanged)
+    def reconcile_rule_group_references(self, event: Event) -> None:
+        """规则组定义保存后清理默认配置和已有订阅中的悬空引用。"""
+        if not event:
+            return
+        event_data = event.event_data
+        if isinstance(event_data, dict):
+            changed_keys = event_data.get("key", set())
+            value = event_data.get("value")
+        else:
+            changed_keys = getattr(event_data, "key", set())
+            value = getattr(event_data, "value", None)
+        if isinstance(changed_keys, str):
+            changed_keys = {changed_keys}
+        normalized_keys = {str(key) for key in (changed_keys or set())}
+        if not normalized_keys.intersection({
+            SystemConfigKey.UserFilterRuleGroups.value,
+            str(SystemConfigKey.UserFilterRuleGroups),
+        }):
+            return
+
+        self._reconcile_rule_group_references(valid_names=_rule_group_names(value))
+
+    @staticmethod
+    def _reconcile_rule_group_references(
+        valid_names: set[str],
+        subscribeoper=None,
+        subscribes: Optional[List[Any]] = None,
+    ) -> None:
+        """持久化清理规则组引用，并同步当前搜索使用的订阅对象。"""
+        system_config = _system_config()
+        for config_key in (
+            SystemConfigKey.SearchFilterRuleGroups,
+            SystemConfigKey.SubscribeFilterRuleGroups,
+            SystemConfigKey.BestVersionFilterRuleGroups,
+        ):
+            original = system_config.get(config_key) or []
+            updated = _retain_rule_group_names(original, valid_names)
+            if updated != original:
+                system_config.set(config_key, updated)
+
+        for config_key in (
+            SystemConfigKey.DefaultMovieSubscribeConfig,
+            SystemConfigKey.DefaultTvSubscribeConfig,
+            SystemConfigKey.DefaultMusicSubscribeConfig,
+        ):
+            original = system_config.get(config_key) or {}
+            original_groups = original.get("filter_groups") or []
+            updated_groups = _retain_rule_group_names(original_groups, valid_names)
+            if updated_groups == original_groups:
+                continue
+            updated = copy.deepcopy(original)
+            updated["filter_groups"] = updated_groups
+            system_config.set(config_key, updated)
+
+        subscribeoper = subscribeoper or get_chain_subscribe_port()
+        for subscribe in subscribes if subscribes is not None else subscribeoper.list():
+            original = getattr(subscribe, "filter_groups", None) or []
+            updated = _retain_rule_group_names(original, valid_names)
+            if updated != original:
+                subscribeoper.update(subscribe.id, {"filter_groups": updated})
+                subscribe.filter_groups = updated
+
     @staticmethod
     def __get_default_subscribe_config(mtype: MediaType, default_config_key: str) -> Optional[str]:
         """
diff --git a/tests/fixtures/architecture/runtime-contract-baseline.json b/tests/fixtures/architecture/runtime-contract-baseline.json
index 3ee0fec7d..dc31298f9 100644
--- a/tests/fixtures/architecture/runtime-contract-baseline.json
+++ b/tests/fixtures/architecture/runtime-contract-baseline.json
@@ -1965,7 +1965,7 @@
     }
   },
   "events": {
-    "consumer_count": 15,
+    "consumer_count": 16,
     "dynamic_consumers": [
       {
         "caller": "app.adapters.system.fsproxy",
@@ -2293,6 +2293,10 @@
       },
       "EventType.ConfigChanged": {
         "consumers": [
+          {
+            "caller": "app.chain.subscribe",
+            "count": 1
+          },
           {
             "caller": "app.runtime.extensions.module_manager",
             "count": 1
diff --git a/tests/test_plugin_system_setting_admission.py b/tests/test_plugin_system_setting_admission.py
index ada3d157f..9d0a84491 100644
--- a/tests/test_plugin_system_setting_admission.py
+++ b/tests/test_plugin_system_setting_admission.py
@@ -227,6 +227,35 @@ async def test_non_plugin_system_config_does_not_resolve_plugin_runtime(
     config.async_set.assert_awaited_once_with(SystemConfigKey.Directories.value, None)
 
 
+@pytest.mark.asyncio
+async def test_rule_group_setting_reconciles_stale_references_when_unchanged(
+    monkeypatch,
+) -> None:
+    """重复保存规则组也应按有效名称对账，修复旧版本遗留的悬空订阅引用。"""
+    config = MagicMock()
+    config.async_set = AsyncMock(return_value=None)
+    monkeypatch.setattr(
+        system_endpoint,
+        "get_runtime_settings",
+        lambda: SimpleNamespace(contains=lambda _key: False),
+    )
+    monkeypatch.setattr(
+        system_endpoint,
+        "get_configured_system_config",
+        lambda: config,
+    )
+    monkeypatch.setattr(system_endpoint.eventmanager, "async_send_event", AsyncMock())
+
+    response = await system_endpoint.set_setting(
+        SystemConfigKey.UserFilterRuleGroups.value,
+        [{"name": "keep", "rule_string": "4K"}],
+        None,
+    )
+
+    assert response.success is True
+    system_endpoint.eventmanager.async_send_event.assert_awaited_once()
+
+
 @pytest.mark.asyncio
 async def test_agent_non_plugin_config_does_not_resolve_plugin_runtime(
     monkeypatch,
diff --git a/tests/test_rule_group_media.py b/tests/test_rule_group_media.py
index 69df0cfd4..fa4465eca 100644
--- a/tests/test_rule_group_media.py
+++ b/tests/test_rule_group_media.py
@@ -1,9 +1,15 @@
+from types import SimpleNamespace
+
+from app.chain import subscribe as subscribe_module
+from app.chain.subscribe import SubscribeChain
 from app.agent.tools.impl._filter_rule_utils import normalize_media_type
 from app.application.rules import RuleHelper
 from app.domain.context import MediaInfo, MusicInfo, TorrentInfo
 from app.modules.filter import FilterModule
+from app.runtime.events import Event
+from app.schemas.event import ConfigChangeEventData
 from app.schemas.rule import FilterRuleGroup
-from app.schemas.types import MediaType
+from app.schemas.types import EventType, MediaType, SystemConfigKey
 
 
 def test_agent_rule_group_media_type_accepts_music_aliases():
@@ -66,3 +72,74 @@ def test_rule_group_category_cannot_cross_media_types(monkeypatch):
     media = MediaInfo(type=MediaType.TV, category="shared")
 
     assert helper.get_rule_group_by_media(media=media, group_names=["movie-category"]) == []
+
+
+def test_reconcile_rule_group_references_removes_all_dangling_bindings(monkeypatch):
+    """规则组设置保存后应清理全局默认项、订阅默认值和已有订阅中的悬空名称。"""
+    values = {
+        SystemConfigKey.SearchFilterRuleGroups: ["keep", "deleted"],
+        SystemConfigKey.SubscribeFilterRuleGroups: ["deleted"],
+        SystemConfigKey.BestVersionFilterRuleGroups: ["keep"],
+        SystemConfigKey.DefaultMovieSubscribeConfig: {
+            "quality": "WEB-DL",
+            "filter_groups": ["deleted", "keep"],
+        },
+        SystemConfigKey.DefaultTvSubscribeConfig: {"filter_groups": ["deleted"]},
+        SystemConfigKey.DefaultMusicSubscribeConfig: {},
+    }
+
+    class Config:
+        """记录规则引用对账产生的系统配置更新。"""
+
+        def get(self, key):
+            """读取当前测试配置。"""
+            return values.get(key)
+
+        def set(self, key, value):
+            """保存配置并更新测试快照。"""
+            values[key] = value
+            return True
+
+    subscribes = [
+        SimpleNamespace(
+            id=1,
+            name="Example",
+            season=1,
+            filter_groups=["deleted", "keep"],
+        )
+    ]
+    updates = []
+    subscribe_port = SimpleNamespace(
+        list=lambda: subscribes,
+        update=lambda subscribe_id, payload: updates.append((subscribe_id, payload)),
+    )
+    monkeypatch.setattr(subscribe_module, "_system_config", lambda: Config())
+    monkeypatch.setattr(
+        subscribe_module,
+        "get_chain_subscribe_port",
+        lambda: subscribe_port,
+    )
+
+    SubscribeChain.reconcile_rule_group_references(
+        object.__new__(SubscribeChain),
+        Event(
+            EventType.ConfigChanged,
+            ConfigChangeEventData(
+                key=SystemConfigKey.UserFilterRuleGroups,
+                value=[{"name": "keep", "rule_string": "4K"}],
+            ),
+        ),
+    )
+
+    assert values[SystemConfigKey.SearchFilterRuleGroups] == ["keep"]
+    assert values[SystemConfigKey.SubscribeFilterRuleGroups] == []
+    assert values[SystemConfigKey.BestVersionFilterRuleGroups] == ["keep"]
+    assert values[SystemConfigKey.DefaultMovieSubscribeConfig] == {
+        "quality": "WEB-DL",
+        "filter_groups": ["keep"],
+    }
+    assert values[SystemConfigKey.DefaultTvSubscribeConfig] == {
+        "filter_groups": [],
+    }
+    assert updates == [(1, {"filter_groups": ["keep"]})]
+    assert subscribes[0].filter_groups == ["keep"]