diff --git a/src/components/setting/mods/backup-config-viewer.tsx b/src/components/setting/mods/backup-config-viewer.tsx
index 1349fc9c3..ff7c0c8e0 100644
--- a/src/components/setting/mods/backup-config-viewer.tsx
+++ b/src/components/setting/mods/backup-config-viewer.tsx
@@ -16,11 +16,16 @@ import { useTranslation } from "react-i18next";
 import { useVerge } from "@/hooks/use-verge";
 import { saveWebdavConfig, createWebdavBackup } from "@/services/cmds";
 import { showNotice } from "@/services/notice-service";
+import {
+  buildWebdavSignature,
+  getWebdavStatus,
+  setWebdavStatus,
+} from "@/services/webdav-status";
 import { isValidUrl } from "@/utils/helper";
 
 interface BackupConfigViewerProps {
   onBackupSuccess: () => Promise<void>;
-  onSaveSuccess: () => Promise<void>;
+  onSaveSuccess: (signature?: string) => Promise<void>;
   onRefresh: () => Promise<void>;
   onInit: () => Promise<void>;
   setLoading: (loading: boolean) => void;
@@ -35,7 +40,7 @@ export const BackupConfigViewer = memo(
     setLoading,
   }: BackupConfigViewerProps) => {
     const { t } = useTranslation();
-    const { verge } = useVerge();
+    const { verge, mutateVerge } = useVerge();
     const { webdav_url, webdav_username, webdav_password } = verge || {};
     const [showPassword, setShowPassword] = useState(false);
     const usernameRef = useRef<HTMLInputElement>(null);
@@ -58,6 +63,10 @@ export const BackupConfigViewer = memo(
       webdav_username !== username ||
       webdav_password !== password;
 
+    const webdavSignature = buildWebdavSignature(verge);
+    const webdavStatus = getWebdavStatus(webdavSignature);
+    const shouldAutoInit = webdavStatus !== "failed";
+
     const handleClickShowPassword = () => {
       setShowPassword((prev) => !prev);
     };
@@ -66,8 +75,11 @@ export const BackupConfigViewer = memo(
       if (!webdav_url || !webdav_username || !webdav_password) {
         return;
       }
+      if (!shouldAutoInit) {
+        return;
+      }
       void onInit();
-    }, [webdav_url, webdav_username, webdav_password, onInit]);
+    }, [webdav_url, webdav_username, webdav_password, onInit, shouldAutoInit]);
 
     const checkForm = () => {
       const username = usernameRef.current?.value;
@@ -97,18 +109,32 @@ export const BackupConfigViewer = memo(
 
     const save = useLockFn(async (data: IWebDavConfig) => {
       checkForm();
+      const signature = buildWebdavSignature({
+        webdav_url: data.url,
+        webdav_username: data.username,
+        webdav_password: data.password,
+      });
+      const trimmedUrl = data.url.trim();
+      const trimmedUsername = data.username.trim();
+
       try {
         setLoading(true);
-        await saveWebdavConfig(
-          data.url.trim(),
-          data.username.trim(),
-          data.password,
-        ).then(() => {
-          showNotice.success(
-            "settings.modals.backup.messages.webdavConfigSaved",
-          );
-          onSaveSuccess();
-        });
+        await saveWebdavConfig(trimmedUrl, trimmedUsername, data.password);
+        await mutateVerge(
+          (current) =>
+            current
+              ? {
+                  ...current,
+                  webdav_url: trimmedUrl,
+                  webdav_username: trimmedUsername,
+                  webdav_password: data.password,
+                }
+              : current,
+          false,
+        );
+        setWebdavStatus(signature, "unknown");
+        showNotice.success("settings.modals.backup.messages.webdavConfigSaved");
+        await onSaveSuccess(signature);
       } catch (error) {
         showNotice.error(
           "settings.modals.backup.messages.webdavConfigSaveFailed",
@@ -122,16 +148,24 @@ export const BackupConfigViewer = memo(
 
     const handleBackup = useLockFn(async () => {
       checkForm();
+      const signature = buildWebdavSignature({
+        webdav_url: url,
+        webdav_username: username,
+        webdav_password: password,
+      });
+
       try {
         setLoading(true);
         await createWebdavBackup().then(async () => {
           showNotice.success("settings.modals.backup.messages.backupCreated");
           await onBackupSuccess();
         });
+        setWebdavStatus(signature, "ready");
       } catch (error) {
         showNotice.error("settings.modals.backup.messages.backupFailed", {
           error,
         });
+        setWebdavStatus(signature, "failed");
       } finally {
         setLoading(false);
       }
diff --git a/src/components/setting/mods/backup-history-viewer.tsx b/src/components/setting/mods/backup-history-viewer.tsx
index f4501d5c8..71dbab5c5 100644
--- a/src/components/setting/mods/backup-history-viewer.tsx
+++ b/src/components/setting/mods/backup-history-viewer.tsx
@@ -36,6 +36,11 @@ import {
   restoreWebDavBackup,
 } from "@/services/cmds";
 import { showNotice } from "@/services/notice-service";
+import {
+  buildWebdavSignature,
+  getWebdavStatus,
+  setWebdavStatus,
+} from "@/services/webdav-status";
 
 dayjs.extend(customParseFormat);
 dayjs.extend(relativeTime);
@@ -85,6 +90,8 @@ export const BackupHistoryViewer = ({
   const isWebDavConfigured = Boolean(
     verge?.webdav_url && verge?.webdav_username && verge?.webdav_password,
   );
+  const webdavSignature = buildWebdavSignature(verge);
+  const webdavStatus = getWebdavStatus(webdavSignature);
   const shouldSkipWebDav = !isLocal && !isWebDavConfigured;
   const pageSize = 8;
   const isBusy = loading || isRestoring || isRestarting;
@@ -128,33 +135,49 @@ export const BackupHistoryViewer = ({
     [t],
   );
 
-  const fetchRows = useCallback(async () => {
-    if (!open) return;
-    if (shouldSkipWebDav) {
-      setRows([]);
-      return;
-    }
-    setLoading(true);
-    try {
-      const list = isLocal ? await listLocalBackup() : await listWebDavBackup();
-      setRows(
-        list
-          .map((item) => buildRow(item))
-          .filter((item): item is BackupRow => item !== null)
-          .sort((a, b) =>
-            a.sort_value === b.sort_value
-              ? b.filename.localeCompare(a.filename)
-              : b.sort_value - a.sort_value,
-          ),
-      );
-    } catch (error) {
-      console.error(error);
-      setRows([]);
-      showNotice.error(error);
-    } finally {
-      setLoading(false);
-    }
-  }, [buildRow, isLocal, open, shouldSkipWebDav]);
+  const fetchRows = useCallback(
+    async (options?: { force?: boolean }) => {
+      if (!open) return;
+      if (shouldSkipWebDav) {
+        setRows([]);
+        return;
+      }
+      if (!isLocal && webdavStatus === "failed" && !options?.force) {
+        setRows([]);
+        return;
+      }
+
+      setLoading(true);
+      try {
+        const list = isLocal
+          ? await listLocalBackup()
+          : await listWebDavBackup();
+        if (!isLocal) {
+          setWebdavStatus(webdavSignature, "ready");
+        }
+        setRows(
+          list
+            .map((item) => buildRow(item))
+            .filter((item): item is BackupRow => item !== null)
+            .sort((a, b) =>
+              a.sort_value === b.sort_value
+                ? b.filename.localeCompare(a.filename)
+                : b.sort_value - a.sort_value,
+            ),
+        );
+      } catch (error) {
+        if (!isLocal) {
+          setWebdavStatus(webdavSignature, "failed");
+        }
+        console.error(error);
+        setRows([]);
+        showNotice.error(error);
+      } finally {
+        setLoading(false);
+      }
+    },
+    [buildRow, isLocal, open, shouldSkipWebDav, webdavSignature, webdavStatus],
+  );
 
   useEffect(() => {
     void fetchRows();
@@ -169,7 +192,7 @@ export const BackupHistoryViewer = ({
   );
 
   const summary = useMemo(() => {
-    if (shouldSkipWebDav) {
+    if (shouldSkipWebDav || (!isLocal && webdavStatus === "failed")) {
       return t("settings.modals.backup.manual.webdav");
     }
     if (!total) return t("settings.modals.backup.history.empty");
@@ -179,7 +202,7 @@ export const BackupHistoryViewer = ({
       count: total,
       recent,
     });
-  }, [rows, shouldSkipWebDav, t, total]);
+  }, [isLocal, rows, shouldSkipWebDav, t, total, webdavStatus]);
 
   const handleDelete = useLockFn(async (filename: string) => {
     if (isRestarting) return;
@@ -241,7 +264,7 @@ export const BackupHistoryViewer = ({
 
   const handleRefresh = () => {
     if (isRestarting) return;
-    void fetchRows();
+    void fetchRows({ force: true });
   };
 
   return (
diff --git a/src/components/setting/mods/backup-viewer.tsx b/src/components/setting/mods/backup-viewer.tsx
index 89802aaa5..858db5499 100644
--- a/src/components/setting/mods/backup-viewer.tsx
+++ b/src/components/setting/mods/backup-viewer.tsx
@@ -14,12 +14,17 @@ import { useCallback, useImperativeHandle, useState } from "react";
 import { useTranslation } from "react-i18next";
 
 import { BaseDialog, DialogRef } from "@/components/base";
+import { useVerge } from "@/hooks/use-verge";
 import {
   createLocalBackup,
   createWebdavBackup,
   importLocalBackup,
 } from "@/services/cmds";
 import { showNotice } from "@/services/notice-service";
+import {
+  buildWebdavSignature,
+  setWebdavStatus,
+} from "@/services/webdav-status";
 
 import { AutoBackupSettings } from "./auto-backup-settings";
 import { BackupHistoryViewer } from "./backup-history-viewer";
@@ -29,6 +34,7 @@ type BackupSource = "local" | "webdav";
 
 export function BackupViewer({ ref }: { ref?: Ref<DialogRef> }) {
   const { t } = useTranslation();
+  const { verge } = useVerge();
   const [open, setOpen] = useState(false);
   const [busyAction, setBusyAction] = useState<BackupSource | null>(null);
   const [localImporting, setLocalImporting] = useState(false);
@@ -36,6 +42,7 @@ export function BackupViewer({ ref }: { ref?: Ref<DialogRef> }) {
   const [historySource, setHistorySource] = useState<BackupSource>("local");
   const [historyPage, setHistoryPage] = useState(0);
   const [webdavDialogOpen, setWebdavDialogOpen] = useState(false);
+  const webdavSignature = buildWebdavSignature(verge);
 
   useImperativeHandle(ref, () => ({
     open: () => setOpen(true),
@@ -59,6 +66,7 @@ export function BackupViewer({ ref }: { ref?: Ref<DialogRef> }) {
       } else {
         await createWebdavBackup();
         showNotice.success("settings.modals.backup.messages.backupCreated");
+        setWebdavStatus(webdavSignature, "ready");
       }
     } catch (error) {
       console.error(error);
@@ -68,6 +76,9 @@ export function BackupViewer({ ref }: { ref?: Ref<DialogRef> }) {
           : "settings.modals.backup.messages.backupFailed",
         target === "local" ? undefined : { error },
       );
+      if (target === "webdav") {
+        setWebdavStatus(webdavSignature, "failed");
+      }
     } finally {
       setBusyAction(null);
     }
diff --git a/src/components/setting/mods/backup-webdav-dialog.tsx b/src/components/setting/mods/backup-webdav-dialog.tsx
index 610350cc6..58c6deee8 100644
--- a/src/components/setting/mods/backup-webdav-dialog.tsx
+++ b/src/components/setting/mods/backup-webdav-dialog.tsx
@@ -3,8 +3,13 @@ import { useCallback, useState } from "react";
 import { useTranslation } from "react-i18next";
 
 import { BaseDialog, BaseLoadingOverlay } from "@/components/base";
+import { useVerge } from "@/hooks/use-verge";
 import { listWebDavBackup } from "@/services/cmds";
 import { showNotice } from "@/services/notice-service";
+import {
+  buildWebdavSignature,
+  setWebdavStatus,
+} from "@/services/webdav-status";
 
 import { BackupConfigViewer } from "./backup-config-viewer";
 
@@ -22,7 +27,9 @@ export const BackupWebdavDialog = ({
   setBusy,
 }: BackupWebdavDialogProps) => {
   const { t } = useTranslation();
+  const { verge } = useVerge();
   const [loading, setLoading] = useState(false);
+  const webdavSignature = buildWebdavSignature(verge);
 
   const handleLoading = useCallback(
     (value: boolean) => {
@@ -33,16 +40,19 @@ export const BackupWebdavDialog = ({
   );
 
   const refreshWebdav = useCallback(
-    async (options?: { silent?: boolean }) => {
+    async (options?: { silent?: boolean; signature?: string }) => {
+      const signature = options?.signature ?? webdavSignature;
       handleLoading(true);
       try {
         await listWebDavBackup();
+        setWebdavStatus(signature, "ready");
         if (!options?.silent) {
           showNotice.success(
             "settings.modals.backup.messages.webdavRefreshSuccess",
           );
         }
       } catch (error) {
+        setWebdavStatus(signature, "failed");
         showNotice.error(
           "settings.modals.backup.messages.webdavRefreshFailed",
           { error },
@@ -51,11 +61,11 @@ export const BackupWebdavDialog = ({
         handleLoading(false);
       }
     },
-    [handleLoading],
+    [handleLoading, webdavSignature],
   );
 
   const refreshSilently = useCallback(
-    () => refreshWebdav({ silent: true }),
+    (signature?: string) => refreshWebdav({ silent: true, signature }),
     [refreshWebdav],
   );
 
diff --git a/src/services/webdav-status.ts b/src/services/webdav-status.ts
new file mode 100644
index 000000000..a33c1bbef
--- /dev/null
+++ b/src/services/webdav-status.ts
@@ -0,0 +1,55 @@
+export type WebdavStatus = "unknown" | "ready" | "failed";
+
+interface WebdavStatusCache {
+  signature: string;
+  status: WebdavStatus;
+  updatedAt: number;
+}
+
+const WEBDAV_STATUS_KEY = "webdav_status_cache";
+
+export const buildWebdavSignature = (
+  verge?: Pick<
+    IVergeConfig,
+    "webdav_url" | "webdav_username" | "webdav_password"
+  > | null,
+) => {
+  const url = verge?.webdav_url?.trim() ?? "";
+  const username = verge?.webdav_username?.trim() ?? "";
+  const password = verge?.webdav_password ?? "";
+
+  if (!url && !username && !password) return "";
+
+  return JSON.stringify([url, username, password]);
+};
+
+const canUseStorage = () => typeof localStorage !== "undefined";
+
+export const getWebdavStatus = (signature: string): WebdavStatus => {
+  if (!signature || !canUseStorage()) return "unknown";
+
+  const raw = localStorage.getItem(WEBDAV_STATUS_KEY);
+  if (!raw) return "unknown";
+
+  try {
+    const data = JSON.parse(raw) as Partial<WebdavStatusCache>;
+    if (!data || data.signature !== signature) return "unknown";
+    return data.status === "ready" || data.status === "failed"
+      ? data.status
+      : "unknown";
+  } catch {
+    return "unknown";
+  }
+};
+
+export const setWebdavStatus = (signature: string, status: WebdavStatus) => {
+  if (!signature || !canUseStorage()) return;
+
+  const payload: WebdavStatusCache = {
+    signature,
+    status,
+    updatedAt: Date.now(),
+  };
+
+  localStorage.setItem(WEBDAV_STATUS_KEY, JSON.stringify(payload));
+};