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/models/system_update_notice.rb b/app/models/system_update_notice.rb
new file mode 100644
index 000000000..44589a405
--- /dev/null
+++ b/app/models/system_update_notice.rb
@@ -0,0 +1,2 @@
+class SystemUpdateNotice < ApplicationRecord
+end
diff --git a/app/views/users/system_update.json.jbuilder b/app/views/users/system_update.json.jbuilder
new file mode 100644
index 000000000..cfc078f03
--- /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
diff --git a/config/routes.rb b/config/routes.rb
index cabdcb18e..d69d432b3 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -64,6 +64,7 @@ Rails.application.routes.draw do
         get :search_user_projects
         post :brief_introduction
         post :attendance
+        get :system_update
 
         resource :trial_apply, only: [:create]
         resources :projects, only: [] do
diff --git a/spec/models/system_update_notice_spec.rb b/spec/models/system_update_notice_spec.rb
new file mode 100644
index 000000000..aceabc264
--- /dev/null
+++ b/spec/models/system_update_notice_spec.rb
@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe SystemUpdateNotice, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end