diff --git a/app/application/configuration.py b/app/application/configuration.py
index 070f600ce..968efb2d6 100644
--- a/app/application/configuration.py
+++ b/app/application/configuration.py
@@ -183,6 +183,7 @@ class SchedulerRuntimeConfig:
     site_link: str | None
     auto_update: bool = False
     auto_update_resource: bool = True
+    wallpaper: str = ""
 
     @property
     def update_check_enabled(self) -> bool:
diff --git a/app/application/image.py b/app/application/image.py
index 1e76e0f09..bc9292273 100644
--- a/app/application/image.py
+++ b/app/application/image.py
@@ -184,6 +184,10 @@ class WallpaperHelper(metaclass=Singleton):
     壁纸帮助类
     """
 
+    def clear_cache(self) -> None:
+        """清除全部壁纸来源缓存，使壁纸配置变更即时生效。"""
+        _clear_wallpaper_caches()
+
     def get_wallpaper(self) -> Optional[str]:
         """
         获取登录页面壁纸
diff --git a/app/scheduler/catalog.py b/app/scheduler/catalog.py
index f8e358962..e88d990d0 100644
--- a/app/scheduler/catalog.py
+++ b/app/scheduler/catalog.py
@@ -62,6 +62,16 @@ def _subscription_search_job_specs(
     )
 
 
+def _wallpaper_job_specs(
+    services: SchedulerServices,
+    wallpaper: str,
+) -> tuple[JobSpec, ...]:
+    """仅在启用壁纸时返回壁纸缓存任务声明。"""
+    if not wallpaper:
+        return ()
+    return (JobSpec("random_wallpager", "壁纸缓存", services.get_wallpapers, "image"),)
+
+
 class SchedulerCatalogOwner(_SchedulerOwnerBase):
     """调度器静态任务目录与 APScheduler 投影。"""
 
@@ -196,7 +206,7 @@ class SchedulerCatalogOwner(_SchedulerOwnerBase):
                 JobSpec("data_cleanup", "数据表清理", services.cleanup_data, "database"),
                 JobSpec("user_auth", "用户认证检查", self.user_auth, "security"),
                 JobSpec("scheduler_job", "公共定时服务", services.run_modules, "module"),
-                JobSpec("random_wallpager", "壁纸缓存", services.get_wallpapers, "image"),
+                *_wallpaper_job_specs(services, config.wallpaper),
                 JobSpec("sitedata_refresh", "站点数据刷新", services.refresh_site_data, "site"),
                 JobSpec("recommend_refresh", "推荐缓存", services.refresh_recommend, "recommend"),
                 JobSpec(
@@ -360,16 +370,17 @@ class SchedulerCatalogOwner(_SchedulerOwnerBase):
             kwargs={"job_id": "transfer"},
         )
 
-        # 后台刷新TMDB壁纸
-        self._scheduler.add_job(
-            self.start,
-            "interval",
-            id="random_wallpager",
-            name="壁纸缓存",
-            minutes=30,
-            next_run_time=datetime.now(pytz.timezone(config.timezone)) + timedelta(seconds=1),
-            kwargs={"job_id": "random_wallpager"},
-        )
+        # 仅在启用壁纸时后台刷新壁纸缓存。
+        if config.wallpaper:
+            self._scheduler.add_job(
+                self.start,
+                "interval",
+                id="random_wallpager",
+                name="壁纸缓存",
+                minutes=30,
+                next_run_time=datetime.now(pytz.timezone(config.timezone)) + timedelta(seconds=1),
+                kwargs={"job_id": "random_wallpager"},
+            )
 
         # 公共定时服务
         self._scheduler.add_job(
diff --git a/app/scheduler/facade.py b/app/scheduler/facade.py
index c9e38e51e..1f8e3ef65 100644
--- a/app/scheduler/facade.py
+++ b/app/scheduler/facade.py
@@ -49,6 +49,10 @@ class Scheduler(
     CONFIG_WATCH = {
         "DEV",
         "TZ",
+        # 壁纸来源或地址变化时重建任务并清理来源缓存。
+        "WALLPAPER",
+        "WALLPAPER_IMAGE_URL",
+        "CUSTOMIZE_WALLPAPER_API_URL",
         "COOKIECLOUD_INTERVAL",
         "MEDIASERVER_SYNC_INTERVAL",
         SystemConfigKey.MediaServers.value,
diff --git a/app/scheduler/lifecycle.py b/app/scheduler/lifecycle.py
index 9618dc94a..2ce4a1112 100644
--- a/app/scheduler/lifecycle.py
+++ b/app/scheduler/lifecycle.py
@@ -30,6 +30,10 @@ class SchedulerLifecycleOwner(_SchedulerOwnerBase):
         with self._lock:
             if self._lifecycle_state != "reloading":
                 return
+        services = getattr(self, "_services", None)
+        clear_wallpaper_cache = getattr(services, "clear_wallpaper_cache", None)
+        if callable(clear_wallpaper_cache):
+            clear_wallpaper_cache()
         self.init(_already_stopped=True)
 
     def init(self, *, _already_stopped: bool = False) -> None:
diff --git a/app/scheduler/services.py b/app/scheduler/services.py
index c230edd97..6897503e0 100644
--- a/app/scheduler/services.py
+++ b/app/scheduler/services.py
@@ -32,3 +32,4 @@ class SchedulerServices:
     process_workflow: JobCallable
     put_message: JobCallable
     post_message: Callable[[Message], Any]
+    clear_wallpaper_cache: Callable[[], None] | None = None
diff --git a/app/startup/composition/configuration.py b/app/startup/composition/configuration.py
index 7f8e05d78..c731312c9 100644
--- a/app/startup/composition/configuration.py
+++ b/app/startup/composition/configuration.py
@@ -197,6 +197,7 @@ def build_scheduler_runtime_config(settings: Settings) -> SchedulerRuntimeConfig
         site_link=settings.MP_DOMAIN("#/site"),
         auto_update=settings.MOVIEPILOT_AUTO_UPDATE,
         auto_update_resource=settings.AUTO_UPDATE_RESOURCE,
+        wallpaper=settings.WALLPAPER,
     )
 
 
diff --git a/app/startup/initializers/scheduler.py b/app/startup/initializers/scheduler.py
index 59e46b8de..10f4db6a1 100644
--- a/app/startup/initializers/scheduler.py
+++ b/app/startup/initializers/scheduler.py
@@ -69,6 +69,7 @@ def configure_scheduler_services() -> None:
             cleanup_data=scheduler_chain.cleanup,
             run_modules=scheduler_chain.scheduler_job,
             get_wallpapers=WallpaperHelper().get_wallpapers,
+            clear_wallpaper_cache=WallpaperHelper().clear_cache,
             refresh_site_data=site_chain.refresh_userdatas,
             refresh_recommend=recommend_chain.refresh_recommend,
             cache_subscribe_calendar=subscribe_chain.cache_calendar,
diff --git a/tests/test_database_backup_scheduler.py b/tests/test_database_backup_scheduler.py
index 338d6f6ee..4020f4c6e 100644
--- a/tests/test_database_backup_scheduler.py
+++ b/tests/test_database_backup_scheduler.py
@@ -82,6 +82,38 @@ def test_auto_update_setting_is_hot_reloadable() -> None:
     assert "AUTO_UPDATE_RESOURCE" in Scheduler.CONFIG_WATCH
 
 
+def test_wallpaper_settings_are_hot_reloadable() -> None:
+    """壁纸来源或地址变化时必须重建调度器并清理缓存。"""
+    assert Scheduler.CONFIG_WATCH.issuperset({
+        "WALLPAPER",
+        "WALLPAPER_IMAGE_URL",
+        "CUSTOMIZE_WALLPAPER_API_URL",
+    })
+
+
+@pytest.mark.parametrize("wallpaper", ["", "tmdb"])
+def test_wallpaper_schedule_follows_wallpaper_setting(monkeypatch, wallpaper) -> None:
+    """无壁纸时不注册缓存任务，启用来源后恢复注册。"""
+    scheduler = _scheduler()
+    scheduler._services = Mock()
+    background_scheduler = Mock()
+    monkeypatch.setattr(scheduler_catalog, "BackgroundScheduler", lambda **_kwargs: background_scheduler)
+    monkeypatch.setattr(scheduler_catalog, "get_plugin_manager", lambda: Mock())
+    monkeypatch.setattr(scheduler_catalog, "get_mediaserver_configs", lambda **_kwargs: [])
+    monkeypatch.setattr(scheduler, "init_workflow_jobs", lambda: None)
+    monkeypatch.setattr(scheduler, "init_agent_task_jobs", lambda: None)
+    monkeypatch.setattr(scheduler, "init_plugin_jobs", lambda: None)
+
+    scheduler._initialize_catalog(_config(wallpaper=wallpaper))
+
+    registered = wallpaper != ""
+    assert ("random_wallpager" in scheduler._jobs) is registered
+    assert any(
+        call.kwargs.get("id") == "random_wallpager"
+        for call in background_scheduler.add_job.call_args_list
+    ) is registered
+
+
 def test_disabled_database_backup_does_not_register_job() -> None:
     """关闭备份时不注册作业。"""
     scheduler = _scheduler()
diff --git a/tests/test_scheduler_lifecycle.py b/tests/test_scheduler_lifecycle.py
index 5f5c1faae..bf1f898d7 100644
--- a/tests/test_scheduler_lifecycle.py
+++ b/tests/test_scheduler_lifecycle.py
@@ -587,6 +587,26 @@ async def test_config_reload_does_not_restart_scheduler_during_shutdown() -> Non
     assert scheduler._lifecycle_state == "stopping"
 
 
+@pytest.mark.anyio
+async def test_config_reload_clears_wallpaper_cache_before_reinitializing() -> None:
+    """壁纸配置热重载应先清理旧缓存，再建立新任务目录。"""
+    scheduler = _scheduler("reload-wallpaper", lambda: None)
+    calls = []
+    scheduler._services = SimpleNamespace(
+        clear_wallpaper_cache=lambda: calls.append("clear"),
+    )
+
+    def init(**_kwargs) -> None:
+        calls.append("init")
+        scheduler._lifecycle_state = "running"
+
+    scheduler.init = init
+
+    await scheduler.on_config_changed()
+
+    assert calls == ["clear", "init"]
+
+
 @pytest.mark.anyio
 async def test_concurrent_config_reload_waits_for_old_scheduler_shutdown(
         monkeypatch,
diff --git a/tests/test_wallpaper_service.py b/tests/test_wallpaper_service.py
index f6080920e..ef66eabca 100644
--- a/tests/test_wallpaper_service.py
+++ b/tests/test_wallpaper_service.py
@@ -13,8 +13,10 @@ from app.application.image import (
     configure_image_ports,
     configure_wallpaper_providers,
     reset_image_ports,
+    reset_wallpaper_providers,
 )
-from app.runtime.config import ConfigModel
+from app.runtime.config import ConfigModel, Settings
+from app.startup.composition.configuration import build_scheduler_runtime_config
 
 
 class _WallpaperTransport:
@@ -119,6 +121,24 @@ def test_reconfigure_image_ports_clears_wallpaper_cache():
         reset_image_ports(*previous)
 
 
+def test_wallpaper_helper_clear_cache_refreshes_provider_result():
+    """壁纸配置热重载后必须丢弃旧来源缓存。"""
+    helper = WallpaperHelper()
+    values = iter(("old-wallpaper", "new-wallpaper"))
+    configure_wallpaper_providers(
+        tmdb_wallpaper=lambda: next(values),
+        tmdb_wallpapers=lambda _count: [],
+        mediaserver_wallpaper=lambda: None,
+        mediaserver_wallpapers=lambda _count: [],
+    )
+    try:
+        assert helper.get_tmdb_wallpaper() == "old-wallpaper"
+        helper.clear_cache()
+        assert helper.get_tmdb_wallpaper() == "new-wallpaper"
+    finally:
+        reset_wallpaper_providers()
+
+
 def test_static_wallpaper_returns_local_or_remote_address_directly(monkeypatch):
     """静态模式不发起 API 请求，直接沿用用户填写的本地路径或 URL。"""
     config = SimpleNamespace(wallpaper="static", wallpaper_image_url="/local/wallpaper.jpg")
@@ -141,6 +161,13 @@ def test_wallpaper_settings_define_backward_compatible_defaults():
     assert ConfigModel.model_fields["WALLPAPER_IMAGE_URL"].default is None
 
 
+def test_scheduler_runtime_config_carries_wallpaper_setting():
+    """调度器快照必须读取当前壁纸来源，供任务目录决定是否注册缓存。"""
+    settings = Settings(WALLPAPER="tmdb")
+
+    assert build_scheduler_runtime_config(settings).wallpaper == "tmdb"
+
+
 def test_login_global_settings_expose_wallpaper_rotation_interval(monkeypatch):
     """登录前全局设置必须下发轮换间隔，避免前端退回硬编码时钟。"""
     values = {