diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index e9fe4ed94..23f6870c8 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -3,6 +3,12 @@ class UsersController < ApplicationController
   before_action :load_user, only: [:show, :homepage_info]
   before_action :check_user_exist, only: [:show, :homepage_info]
 
+  # 检查是否更新
+  def system_update
+    @notice = SystemUpdateNotice.last
+  end
+
+
   def show;end
 
   def update
diff --git a/app/views/users/system_update.json.jbuilder b/app/views/users/system_update.json.jbuilder
new file mode 100644
index 000000000..c8cf5a565
--- /dev/null
+++ b/app/views/users/system_update.json.jbuilder
@@ -0,0 +1,6 @@
+if @notice && @notice.end.time < Time.now
+  json.system_update true
+  json.(@notice, :subject, :notes, :start_time, :end_time)
+else
+  json.system_update false
+end
\ No newline at end of file