diff --git a/dashboard/src/App.vue b/dashboard/src/App.vue
index af23e75ff..4822d8489 100644
--- a/dashboard/src/App.vue
+++ b/dashboard/src/App.vue
@@ -15,20 +15,31 @@
 
 <script setup>
 import { RouterView } from 'vue-router';
-import { computed, onBeforeUnmount, onMounted, ref } from 'vue'
-import { useToastStore } from '@/stores/toast'
-import WaitingForRestart from '@/components/shared/WaitingForRestart.vue'
+import { computed, onBeforeUnmount, onMounted, ref, watch } from 'vue';
+import { useTheme } from "vuetify";
+import { useToastStore } from '@/stores/toast';
+import { useCustomizerStore } from '@/stores/customizer';
+import WaitingForRestart from '@/components/shared/WaitingForRestart.vue';
 
-const toastStore = useToastStore()
-const globalWaitingRef = ref(null)
-let disposeTrayRestartListener = null
+const toastStore = useToastStore();
+const theme = useTheme();
+const customizer = useCustomizerStore();
+const globalWaitingRef = ref(null);
+let disposeTrayRestartListener = null;
 
 const snackbarShow = computed({
   get: () => !!toastStore.current,
   set: (val) => {
     if (!val) toastStore.shift()
   }
-})
+});
+
+// 统一监听 uiTheme 变化并同步到 Vuetify
+watch(() => customizer.uiTheme, (newTheme) => {
+  if (newTheme) {
+    theme.global.name.value = newTheme;
+  }
+}, { immediate: true });
 
 onMounted(() => {
   const desktopBridge = window.astrbotDesktop
diff --git a/dashboard/src/components/chat/Chat.vue b/dashboard/src/components/chat/Chat.vue
index 631b9d600..eaa4cb620 100644
--- a/dashboard/src/components/chat/Chat.vue
+++ b/dashboard/src/components/chat/Chat.vue
@@ -210,7 +210,6 @@ import { ref, computed, watch, onMounted, onBeforeUnmount, nextTick } from 'vue'
 import { useRouter, useRoute } from 'vue-router';
 import { useCustomizerStore } from '@/stores/customizer';
 import { useI18n, useModuleI18n } from '@/i18n/composables';
-import { useTheme } from 'vuetify';
 import MessageList from '@/components/chat/MessageList.vue';
 import ConversationSidebar from '@/components/chat/ConversationSidebar.vue';
 import ChatInput from '@/components/chat/ChatInput.vue';
@@ -243,7 +242,6 @@ const route = useRoute();
 const { t } = useI18n();
 const { tm } = useModuleI18n('features/chat');
 const { warning: toastWarning } = useToast();
-const theme = useTheme();
 const customizer = useCustomizerStore();
 
 // UI 状态
@@ -340,7 +338,7 @@ interface ReplyInfo {
 }
 const replyTo = ref<ReplyInfo | null>(null);
 
-const isDark = computed(() => useCustomizerStore().uiTheme === 'PurpleThemeDark');
+const isDark = computed(() => customizer.isDarkTheme);
 const sendShortcut = ref<SendShortcut>('shift_enter');
 
 function setSendShortcut(mode: SendShortcut) {
@@ -380,10 +378,9 @@ watch(() => customizer.chatSidebarOpen, (val) => {
     }
 });
 
+// 使用新的逻辑切换主题
 function toggleTheme() {
-    const newTheme = customizer.uiTheme === 'PurpleTheme' ? 'PurpleThemeDark' : 'PurpleTheme';
-    customizer.SET_UI_THEME(newTheme);
-    theme.global.name.value = newTheme;
+    customizer.TOGGLE_DARK_MODE();
 }
 
 function toggleFullscreen() {
diff --git a/dashboard/src/components/chat/ChatInput.vue b/dashboard/src/components/chat/ChatInput.vue
index aff404958..d34e5f940 100644
--- a/dashboard/src/components/chat/ChatInput.vue
+++ b/dashboard/src/components/chat/ChatInput.vue
@@ -202,7 +202,8 @@ const emit = defineEmits<{
 }>();
 
 const { tm } = useModuleI18n('features/chat');
-const isDark = computed(() => useCustomizerStore().uiTheme === 'PurpleThemeDark');
+// 从新的预设getter获取
+const isDark = computed(() => useCustomizerStore().isDarkTheme);
 
 const inputField = ref<HTMLTextAreaElement | null>(null);
 const imageInputRef = ref<HTMLInputElement | null>(null);
diff --git a/dashboard/src/components/chat/LiveMode.vue b/dashboard/src/components/chat/LiveMode.vue
index 2e11277ad..54b01f4d9 100644
--- a/dashboard/src/components/chat/LiveMode.vue
+++ b/dashboard/src/components/chat/LiveMode.vue
@@ -99,16 +99,15 @@
 <script setup lang="ts">
 import axios from "axios";
 import { ref, computed, onBeforeUnmount, watch } from "vue";
-import { useTheme } from "vuetify";
 import { useVADRecording } from "@/composables/useVADRecording";
 import SiriOrb from "./LiveOrb.vue";
+import { useCustomizerStore } from "@/stores/customizer";
 
 const emit = defineEmits<{
   close: [];
 }>();
 
-const theme = useTheme();
-const isDark = computed(() => theme.global.current.value.dark);
+const isDark = computed(() => !useCustomizerStore().isDarkTheme);
 
 // 使用 VAD Recording composable
 const vadRecording = useVADRecording();
diff --git a/dashboard/src/components/chat/StandaloneChat.vue b/dashboard/src/components/chat/StandaloneChat.vue
index ba0cd4eeb..7ea417103 100644
--- a/dashboard/src/components/chat/StandaloneChat.vue
+++ b/dashboard/src/components/chat/StandaloneChat.vue
@@ -74,7 +74,6 @@ import { ref, computed, onMounted, onBeforeUnmount, nextTick } from "vue";
 import axios from "axios";
 import { useCustomizerStore } from "@/stores/customizer";
 import { useI18n, useModuleI18n } from "@/i18n/composables";
-import { useTheme } from "vuetify";
 import MessageList from "@/components/chat/MessageList.vue";
 import ChatInput from "@/components/chat/ChatInput.vue";
 import { useMessages } from "@/composables/useMessages";
@@ -181,9 +180,7 @@ const chatInputRef = ref<InstanceType<typeof ChatInput> | null>(null);
 // 输入状态
 const prompt = ref("");
 
-const isDark = computed(
-  () => useCustomizerStore().uiTheme === "PurpleThemeDark",
-);
+const isDark = computed(() => useCustomizerStore().isDarkTheme);
 
 function openImagePreview(imageUrl: string) {
   previewImageUrl.value = imageUrl;
diff --git a/dashboard/src/components/shared/ExtensionCard.vue b/dashboard/src/components/shared/ExtensionCard.vue
index c32454578..1e2cea2fe 100644
--- a/dashboard/src/components/shared/ExtensionCard.vue
+++ b/dashboard/src/components/shared/ExtensionCard.vue
@@ -136,13 +136,13 @@ const viewChangelog = () => {
     :style="{
       position: 'relative',
       backgroundColor:
-        useCustomizerStore().uiTheme === 'PurpleTheme'
+        !useCustomizerStore().isDarkTheme
           ? marketMode
             ? '#f8f0dd'
             : '#ffffff'
           : '#282833',
       color:
-        useCustomizerStore().uiTheme === 'PurpleTheme'
+        !useCustomizerStore().isDarkTheme
           ? '#000000dd'
           : '#ffffff',
     }"
diff --git a/dashboard/src/i18n/locales/en-US/features/settings.json b/dashboard/src/i18n/locales/en-US/features/settings.json
index 27a6c2b76..ad5af6735 100644
--- a/dashboard/src/i18n/locales/en-US/features/settings.json
+++ b/dashboard/src/i18n/locales/en-US/features/settings.json
@@ -51,6 +51,11 @@
       "subtitle": "Customize theme primary and secondary colors. Changes apply immediately and are stored locally in your browser.",
       "primary": "Primary Color",
       "secondary": "Secondary Color"
+    },
+    "autoSync": {
+      "title": "Auto-Switch Light/Dark Theme",
+      "subtitle": "Automatically switch between light and dark themes based on your system's appearance setting.",
+      "label": "Enable Auto-Switch"
     }
   },
   "reset": {
diff --git a/dashboard/src/i18n/locales/zh-CN/features/chat.json b/dashboard/src/i18n/locales/zh-CN/features/chat.json
index 24ea2a84b..61225c29e 100644
--- a/dashboard/src/i18n/locales/zh-CN/features/chat.json
+++ b/dashboard/src/i18n/locales/zh-CN/features/chat.json
@@ -69,8 +69,8 @@
     "confirmDelete": "确定要删除“{name}”吗？此操作无法撤销。"
   },
   "modes": {
-    "darkMode": "切换到夜间模式",
-    "lightMode": "切换到日间模式"
+    "darkMode": "切换到深色模式",
+    "lightMode": "切换到浅色模式"
   },
   "shortcuts": {
     "help": "获取帮助",
diff --git a/dashboard/src/i18n/locales/zh-CN/features/settings.json b/dashboard/src/i18n/locales/zh-CN/features/settings.json
index e80eae4e9..c33a99b9c 100644
--- a/dashboard/src/i18n/locales/zh-CN/features/settings.json
+++ b/dashboard/src/i18n/locales/zh-CN/features/settings.json
@@ -51,6 +51,11 @@
       "subtitle": "自定义主题主色与辅助色。修改后立即生效，并保存在浏览器本地。",
       "primary": "主色",
       "secondary": "辅助色"
+    },
+    "autoSync": {
+      "title": "自动切换深色主题",
+      "subtitle": "根据您的浏览器外观设置自动切换主题",
+      "label": "启用自动切换"
     }
   },
   "reset": {
diff --git a/dashboard/src/layouts/full/vertical-header/VerticalHeader.vue b/dashboard/src/layouts/full/vertical-header/VerticalHeader.vue
index e7b8b88a5..681091cf7 100644
--- a/dashboard/src/layouts/full/vertical-header/VerticalHeader.vue
+++ b/dashboard/src/layouts/full/vertical-header/VerticalHeader.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, computed, watch, onMounted } from "vue";
+import { ref, computed, watch } from "vue";
 import { useCustomizerStore } from "@/stores/customizer";
 import axios from "axios";
 import Logo from "@/components/shared/Logo.vue";
@@ -13,7 +13,6 @@ import "highlight.js/styles/github.css";
 import { useI18n } from "@/i18n/composables";
 import { router } from "@/router";
 import { useRoute } from "vue-router";
-import { useTheme } from "vuetify";
 import StyledMenu from "@/components/shared/StyledMenu.vue";
 import { useLanguageSwitcher } from "@/i18n/composables";
 import type { Locale } from "@/i18n/types";
@@ -25,7 +24,6 @@ enableMermaid();
 
 const customizer = useCustomizerStore();
 const authStore = useAuthStore();
-const theme = useTheme();
 const { t } = useI18n();
 
 const { languageOptions, currentLanguage, switchLanguage, locale } =
@@ -429,15 +427,36 @@ function updateDashboard() {
     });
 }
 
-function toggleDarkMode() {
-  const newTheme =
-    customizer.uiTheme === "PurpleThemeDark"
-      ? "PurpleTheme"
-      : "PurpleThemeDark";
-  customizer.SET_UI_THEME(newTheme);
-  theme.global.name.value = newTheme;
+// 修改：使用状态管理切换主题
+function toggleTheme() {
+  customizer.TOGGLE_DARK_MODE();
 }
 
+function autoSwitchTheme() {
+  // 根据浏览器主题同步页面主题
+  customizer.APPLY_SYSTEM_THEME();
+}
+
+function autoSwitchThemeListener(e: MediaQueryListEvent) {
+  if (customizer.autoSwitchTheme) {
+    autoSwitchTheme();
+  }
+}
+
+// 通过 watch 变量来添加和移除监听器
+watch(() => customizer.autoSwitchTheme, (isAuto) => {
+  if (typeof window === 'undefined') return;
+  
+  const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
+  
+  if (isAuto) {
+    autoSwitchTheme();
+    mediaQuery.addEventListener('change', autoSwitchThemeListener);
+  } else {
+    mediaQuery.removeEventListener('change', autoSwitchThemeListener);
+  }
+}, { immediate: true });
+
 function openReleaseNotesDialog(body: string, tag: string) {
   selectedReleaseNotes.value = body;
   selectedReleaseTag.value = tag;
@@ -510,6 +529,7 @@ const isChristmas = computed(() => {
   const day = today.getDate();
   return month === 12 && day === 25;
 });
+
 </script>
 
 <template>
@@ -713,14 +733,14 @@ const isChristmas = computed(() => {
 
         <!-- 主题切换 -->
         <v-list-item
-          @click="toggleDarkMode()"
+          @click="toggleTheme()"
           class="styled-menu-item"
           rounded="md"
         >
           <template v-slot:prepend>
             <v-icon>
               {{
-                useCustomizerStore().uiTheme === "PurpleThemeDark"
+                useCustomizerStore().isDarkTheme
                   ? "mdi-weather-night"
                   : "mdi-white-balance-sunny"
               }}
@@ -728,7 +748,7 @@ const isChristmas = computed(() => {
           </template>
           <v-list-item-title>
             {{
-              useCustomizerStore().uiTheme === "PurpleThemeDark"
+              useCustomizerStore().isDarkTheme
                 ? t("core.header.buttons.theme.light")
                 : t("core.header.buttons.theme.dark")
             }}
diff --git a/dashboard/src/stores/customizer.ts b/dashboard/src/stores/customizer.ts
index 09d44fabb..4b2f73762 100644
--- a/dashboard/src/stores/customizer.ts
+++ b/dashboard/src/stores/customizer.ts
@@ -2,7 +2,7 @@ import { defineStore } from 'pinia';
 import config from '@/config';
 
 export const useCustomizerStore = defineStore({
-  id: 'customizer',
+  id: "customizer",
   state: () => ({
     Sidebar_drawer: config.Sidebar_drawer,
     Customizer_drawer: config.Customizer_drawer,
@@ -10,11 +10,14 @@ export const useCustomizerStore = defineStore({
     fontTheme: "Poppins",
     uiTheme: config.uiTheme,
     inputBg: config.inputBg,
-    viewMode: (localStorage.getItem('viewMode') as 'bot' | 'chat') || 'bot', // 'bot' 或 'chat'
-    chatSidebarOpen: false // chat mode mobile sidebar state
+    viewMode: (localStorage.getItem("viewMode") as "bot" | "chat") || "bot", // 'bot' 或 'chat'
+    chatSidebarOpen: false, // chat mode mobile sidebar state
+    autoSwitchTheme: localStorage.getItem("autoSwitchTheme") === "true", // 自动同步主题
   }),
 
-  getters: {},
+  getters: {
+    isDarkTheme: (state) => state.uiTheme === "PurpleThemeDark",
+  },
   actions: {
     SET_SIDEBAR_DRAWER() {
       this.Sidebar_drawer = !this.Sidebar_drawer;
@@ -29,9 +32,27 @@ export const useCustomizerStore = defineStore({
       this.uiTheme = payload;
       localStorage.setItem("uiTheme", payload);
     },
-    SET_VIEW_MODE(payload: 'bot' | 'chat') {
+    SET_VIEW_MODE(payload: "bot" | "chat") {
       this.viewMode = payload;
-      localStorage.setItem('viewMode', payload);
+      localStorage.setItem("viewMode", payload);
+    },
+    SET_AUTO_SYNC(payload: boolean) {
+      this.autoSwitchTheme = payload;
+      localStorage.setItem("autoSwitchTheme", String(payload));
+    },
+    // 新增：手动切换主题（同时关闭自动同步）
+    TOGGLE_DARK_MODE() {
+      // 手动切换时禁用自动同步
+      this.SET_AUTO_SYNC(false);
+      const newTheme = this.isDarkTheme ? "PurpleTheme" : "PurpleThemeDark";
+      this.SET_UI_THEME(newTheme);
+    },
+    // 新增：应用系统主题（用于自动同步）
+    APPLY_SYSTEM_THEME() {
+      if (typeof window === "undefined") return;
+      const isDark = window.matchMedia("(prefers-color-scheme: dark)").matches;
+      const themeToApply = isDark ? "PurpleThemeDark" : "PurpleTheme";
+      this.SET_UI_THEME(themeToApply);
     },
     TOGGLE_CHAT_SIDEBAR() {
       this.chatSidebarOpen = !this.chatSidebarOpen;
@@ -39,5 +60,5 @@ export const useCustomizerStore = defineStore({
     SET_CHAT_SIDEBAR(payload: boolean) {
       this.chatSidebarOpen = payload;
     },
-  }
+  },
 });
diff --git a/dashboard/src/views/ConversationPage.vue b/dashboard/src/views/ConversationPage.vue
index 3d25855f3..9a4623aba 100644
--- a/dashboard/src/views/ConversationPage.vue
+++ b/dashboard/src/views/ConversationPage.vue
@@ -499,7 +499,7 @@ export default {
         // 检测是否为暗色模式
         isDark() {
             console.log('isDark', this.customizerStore.uiTheme);
-            return this.customizerStore.uiTheme === 'PurpleThemeDark';
+            return this.customizerStore.isDarkTheme;
         },
 
         // 将对话历史转换为 MessageList 组件期望的格式
diff --git a/dashboard/src/views/Settings.vue b/dashboard/src/views/Settings.vue
index e8b93a831..aabaa13af 100644
--- a/dashboard/src/views/Settings.vue
+++ b/dashboard/src/views/Settings.vue
@@ -380,6 +380,11 @@
         </v-row>
       </v-list-item>
 
+      <v-list-item :subtitle="tm('style.autoSync.subtitle')" :title="tm('style.autoSync.title')">
+        <v-switch v-model="autoThemeSwitcher" :label="tm('style.autoSync.label')" color="primary" hide-details
+          class="ml-3" />
+      </v-list-item>
+
       <v-list-subheader>{{ tm("backup.title") }}</v-list-subheader>
 
       <v-list-item
@@ -568,6 +573,14 @@ const applyThemeColors = () => {
   toastStore.success(tm("common.saved"));
 };
 
+const autoThemeSwitcher = computed({
+  get: () => customizer.autoSwitchTheme,
+  set: (value) => {
+    customizer.SET_AUTO_SYNC(value);
+    if (value) { customizer.APPLY_SYSTEM_THEME() };
+  }
+});
+
 const wfr = ref(null);
 const migrationDialog = ref(null);
 const backupDialog = ref(null);
diff --git a/dashboard/src/views/authentication/auth/LoginPage.vue b/dashboard/src/views/authentication/auth/LoginPage.vue
index 84ce52075..c1f4cbe6d 100644
--- a/dashboard/src/views/authentication/auth/LoginPage.vue
+++ b/dashboard/src/views/authentication/auth/LoginPage.vue
@@ -7,7 +7,6 @@ import { useApiStore } from "@/stores/api";
 import { useRouter } from "vue-router";
 import { useCustomizerStore } from "@/stores/customizer";
 import { useModuleI18n } from "@/i18n/composables";
-import { useTheme } from "vuetify";
 
 const cardVisible = ref(false);
 const router = useRouter();
@@ -15,7 +14,6 @@ const authStore = useAuthStore();
 const apiStore = useApiStore();
 const customizer = useCustomizerStore();
 const { tm: t } = useModuleI18n("features/auth");
-const theme = useTheme();
 
 const serverConfigDialog = ref(false);
 const apiUrl = ref(apiStore.apiBaseUrl);
@@ -47,12 +45,7 @@ function isCustomPreset(name: string) {
 
 // 主题切换函数
 function toggleTheme() {
-  const newTheme =
-    customizer.uiTheme === "PurpleThemeDark"
-      ? "PurpleTheme"
-      : "PurpleThemeDark";
-  customizer.SET_UI_THEME(newTheme);
-  theme.global.name.value = newTheme;
+  customizer.TOGGLE_DARK_MODE();
 }
 
 onMounted(() => {
@@ -114,10 +107,10 @@ onMounted(() => {
               size="small"
             >
               <v-icon size="18" :color="'rgb(var(--v-theme-primary))'">
-                mdi-white-balance-sunny
+                {{ customizer.isDarkTheme ? 'mdi-weather-night' : 'mdi-white-balance-sunny' }}
               </v-icon>
               <v-tooltip activator="parent" location="top">
-                {{ t("theme.switchToLight") }}
+                {{ customizer.isDarkTheme ? t('theme.switchToLight') : t('theme.switchToDark') }}
               </v-tooltip>
             </v-btn>
           </div>