diff --git a/web/app/components/header/maintenance-notice.tsx b/web/app/components/header/maintenance-notice.tsx
new file mode 100644
index 0000000000..e44a6721b5
--- /dev/null
+++ b/web/app/components/header/maintenance-notice.tsx
@@ -0,0 +1,38 @@
+import { useState } from 'react'
+import { useContext } from 'use-context-selector'
+import I18n from '@/context/i18n'
+import { X } from '@/app/components/base/icons/src/vender/line/general'
+
+const NOTICE_I18N = {
+  title: {
+    'en': 'Important Notice',
+    'zh-Hans': '重要公告',
+  },
+  desc: {
+    'en': 'Our system will be unavailable from 19:00 to 24:00 UTC on August 28 for an upgrade. For questions, kindly contact our support team (support@dify.ai). We value your patience.',
+    'zh-Hans': '为了有效提升数据检索能力及稳定性，Dify 将于 2022 年 8 月 29 日 03:00 至 08:00 期间进行服务升级，届时 Dify 云端版及应用将无法访问。感谢您的耐心与支持。',
+  },
+}
+
+const MaintenanceNotice = () => {
+  const { locale } = useContext(I18n)
+  const [showNotice, setShowNotice] = useState(localStorage.getItem('hide-maintenance-notice') !== '1')
+
+  const handleCloseNotice = () => {
+    localStorage.setItem('hide-maintenance-notice', '1')
+    setShowNotice(false)
+  }
+
+  if (!showNotice)
+    return null
+
+  return (
+    <div className='shrink-0 flex items-center px-4 h-[38px] bg-[#FFFAEB] border-b border-[0.5px] border-b-[#FEF0C7] z-20'>
+      <div className='shrink-0 flex items-center mr-2 px-2 h-[22px] bg-[#F79009] text-white text-[11px] font-medium rounded-xl'>{NOTICE_I18N.title[locale]}</div>
+      <div className='grow text-xs font-medium text-gray-700'>{NOTICE_I18N.desc[locale]}</div>
+      <X className='shrink-0 w-4 h-4 text-gray-500 cursor-pointer' onClick={handleCloseNotice} />
+    </div>
+  )
+}
+
+export default MaintenanceNotice
diff --git a/web/app/layout.tsx b/web/app/layout.tsx
index 0f3ac793f3..ea5e06f586 100644
--- a/web/app/layout.tsx
+++ b/web/app/layout.tsx
@@ -25,6 +25,7 @@ const LocaleLayout = ({
         data-pubic-api-prefix={process.env.NEXT_PUBLIC_PUBLIC_API_PREFIX}
         data-public-edition={process.env.NEXT_PUBLIC_EDITION}
         data-public-sentry-dsn={process.env.NEXT_PUBLIC_SENTRY_DSN}
+        data-public-maintenance-notice={process.env.NEXT_PUBLIC_MAINTENANCE_NOTICE}
       >
         <BrowerInitor>
           <SentryInitor>
diff --git a/web/context/app-context.tsx b/web/context/app-context.tsx
index 793e3a5a35..e5f694f224 100644
--- a/web/context/app-context.tsx
+++ b/web/context/app-context.tsx
@@ -9,6 +9,7 @@ import Loading from '@/app/components/base/loading'
 import { fetchCurrentWorkspace, fetchLanggeniusVersion, fetchUserProfile } from '@/service/common'
 import type { App } from '@/types/app'
 import type { ICurrentWorkspace, LangGeniusVersionResponse, UserProfileResponse } from '@/models/common'
+import MaintenanceNotice from '@/app/components/header/maintenance-notice'
 
 export type AppContextValue = {
   apps: App[]
@@ -119,8 +120,11 @@ export const AppContextProvider: FC<AppContextProviderProps> = ({ children }) =>
       isCurrentWorkspaceManager,
       mutateCurrentWorkspace,
     }}>
-      <div ref={pageContainerRef} className='relative flex flex-col h-full overflow-auto bg-gray-100'>
-        {children}
+      <div className='flex flex-col h-full'>
+        {globalThis.document?.body?.getAttribute('data-public-maintenance-notice') && <MaintenanceNotice />}
+        <div ref={pageContainerRef} className='grow relative flex flex-col overflow-auto bg-gray-100'>
+          {children}
+        </div>
       </div>
     </AppContext.Provider>
   )