diff --git a/app/controllers/concerns/laboratory_helper.rb b/app/controllers/concerns/laboratory_helper.rb
index 6ffce969..5cc0ca55 100644
--- a/app/controllers/concerns/laboratory_helper.rb
+++ b/app/controllers/concerns/laboratory_helper.rb
@@ -8,7 +8,7 @@ module LaboratoryHelper
     helper_method :default_setting
     helper_method :default_yun_session
     helper_method :default_course_links
-    helper_method :manager_url
+    helper_method :manager_main_site_url
   end
 
   def current_laboratory
@@ -48,7 +48,7 @@ module LaboratoryHelper
     }
   end
 
-  def manager_url
-    {name: '管理', link: "#{EduSetting.get('host_name')}/managements"}
+  def manager_main_site_url
+    {name: '管理', link: "#{EduSetting.get('host_main_site')}/managements"}
   end
 end
diff --git a/app/views/settings/show.json.jbuilder b/app/views/settings/show.json.jbuilder
index 8eddf8e6..3be28084 100644
--- a/app/views/settings/show.json.jbuilder
+++ b/app/views/settings/show.json.jbuilder
@@ -28,7 +28,7 @@ json.setting do
   #   nav_bar[2]["hidden"] = true
   # end
   if current_user && current_user.admin?
-    nav_bar << manager_url
+    nav_bar << manager_main_site_url
   end
   json.name default_setting.name
   json.nav_logo_url default_setting.nav_logo_url&.[](1..-1)