diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index d61634f4d..488289815 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -289,7 +289,7 @@ class CoursesController < ApplicationController
     next_inform = inform.next_inform
     ActiveRecord::Base.transaction do
       if next_inform
-        render_error('已经到达最底部')
+        render_error('已经到达最顶部')
       else
         inform.update_attribute(:position, (position + 1))
         next_inform.update_attribute(:position, last_inform.position - 1)
@@ -303,7 +303,7 @@ class CoursesController < ApplicationController
     last_inform = inform.last_inform
     ActiveRecord::Base.transaction do
       if last_inform
-        render_error('已经到达最顶部')
+        render_error('已经到达最底部')
       else
         inform.update_attribute(:position, (position - 1))
         last_inform.update_attribute(:position, last_inform.position + 1)