diff --git a/app/controllers/tags_controller.rb b/app/controllers/tags_controller.rb
index 4c0d91884..0216d529d 100644
--- a/app/controllers/tags_controller.rb
+++ b/app/controllers/tags_controller.rb
@@ -256,14 +256,14 @@ class TagsController < ApplicationController
   
   # 获取有某类对象的tag总数
   def get_tags_size
-    @issues_tags_num = Issue.tag_counts.size
-    @projects_tags_num = Project.tag_counts.size
-    @users_tags_num = User.tag_counts.size
-    @bids_tags_num = Bid.tag_counts.size
-    forum_tags_num = Forum.tag_counts.size
-    attachment_tags_num = Attachment.tag_counts.size
-    @open_source_projects_num = OpenSourceProject.tag_counts.size
-    @contests_tags_num = Contest.tag_counts.size
+    @issues_tags_num = ActsAsTaggableOn::Tagging.where(taggable_type:"Issue").count
+    @projects_tags_num = ActsAsTaggableOn::Tagging.where(taggable_type:"Project").count
+    @users_tags_num = ActsAsTaggableOn::Tagging.where(taggable_type:"User").count
+    @bids_tags_num = ActsAsTaggableOn::Tagging.where(taggable_type:"Bid").count
+    forum_tags_num = ActsAsTaggableOn::Tagging.where(taggable_type:"Forum").count
+    attachment_tags_num = ActsAsTaggableOn::Tagging.where(taggable_type:"Attachment").count
+    @open_source_projects_num =  ActsAsTaggableOn::Tagging.where(taggable_type:"OpenSourceProject").count
+    @contests_tags_num = ActsAsTaggableOn::Tagging.where(taggable_type:"Contest").count
     return @users_tags_num,@projects_tags_num,@issues_tags_num,@bids_tags_num, forum_tags_num, attachment_tags_num, @contests_tags_num, @open_source_projects_num
   end
   
diff --git a/db/migrate/20140701075839_add_tag_type_index_to_tagging.rb b/db/migrate/20140701075839_add_tag_type_index_to_tagging.rb
new file mode 100644
index 000000000..11a5b4ef9
--- /dev/null
+++ b/db/migrate/20140701075839_add_tag_type_index_to_tagging.rb
@@ -0,0 +1,5 @@
+class AddTagTypeIndexToTagging < ActiveRecord::Migration
+  def change
+  	add_index :taggings, :taggable_type
+  end
+end