diff --git a/app/controllers/tags_controller.rb b/app/controllers/tags_controller.rb
index 253faa2b1..e0cb8af8e 100644
--- a/app/controllers/tags_controller.rb
+++ b/app/controllers/tags_controller.rb
@@ -230,6 +230,53 @@ class TagsController < ApplicationController
     end
   end
 
+  #更新某个tag名称
+  def update_tag_name
+    @tag_name = params[:tagName]
+    @rename_tag_name = params[:renameName]
+    @taggable_id = params[:taggableId]
+    @taggable_type = numbers_to_object_type(params[:taggableType])
+
+
+    @rename_tag = (ActsAsTaggableOn::Tag.find_by_name(@rename_tag_name))  #查找重命名后的tag
+    @tag_id = (ActsAsTaggableOn::Tag.find_by_name(@tag_name)).id  #重命名前的tag_id
+    @taggings = ActsAsTaggableOn::Tagging.find_by_tag_id_and_taggable_id_and_taggable_type(@tag_id,@taggable_id,@taggable_type)
+    @obj = get_object(@taggable_id,params[:taggableType])
+    if(@rename_tag.nil?) #这次命名的是新的tag
+
+      # 是否还有其他记录 引用了 tag_id
+      @tagging = ActsAsTaggableOn::Tagging.where("tag_id = #{@tag_id}")
+      # 如果taggings表中记录为 1 ，那么改变@tag_id对应的tag的名字
+      if @tagging.count == 1
+        @tag = ActsAsTaggableOn::Tag.find_by_id(@tag_id)
+        @tag.update_attributes({:name=>@rename_tag_name})
+      else #如果tagging表中的记录大于1，那么就要新增tag记录
+
+        unless @obj.nil?
+          @obj.tag_list.add(@rename_tag_name.split(","))
+         @obj.save
+        end
+        #删除原来的对应的taggings的记录
+        unless @taggings.nil?
+          @taggings.delete
+        end
+      end
+    else #这是已有的tag
+      # 更改taggings记录里的tag_id
+      unless @taggings.nil?
+        @taggings.update_attributes({:tag_id=>@rename_tag.id})
+      end
+    end
+    @obj_flag =  params[:taggableType]
+    if @obj && @obj_flag == '6' && @obj.container.kind_of?(Course)
+      @course = @obj.container
+      @tag_list = @tag_list = get_course_tag_list @course
+    end
+    respond_to do |format|
+      format.js
+    end
+  end
+
   def tag_save
     @select_tag_name = params[:tag_for_save][:tag_name]
     @tags = params[:tag_for_save][:name]
diff --git a/app/views/files/index.html.erb b/app/views/files/index.html.erb
index aefa1a5a9..fa15c1fc7 100644
--- a/app/views/files/index.html.erb
+++ b/app/views/files/index.html.erb
@@ -223,6 +223,54 @@
                 });
 
     }
+    var tagNameHtml; //当前双击的链接的父节点的html
+    var tagName;  //标签的值
+    var parentCssBorder; //当前双击的链接的父节点
+    var ele;    //当前双击的链接
+    var tagId; //标签的id
+    var taggableType; //被标签的类型
+    function rename_tag(domEle,name,id,type){
+        if(domEle.children().get(0) != undefined ){ //已经是编辑框的情况下不要动
+            return;
+        }
+        tagNameHtml = domEle.parent().html()
+        tagName = name;
+        parentCssBorder = domEle.parent().css("border");
+        ele = domEle;
+        tagId = id;
+        taggableType = type;
+        domEle.html('<input name="" id="renameTagName" style="width: 100px;" value="'+name+'"/>');
+        domEle.parent().css("border","1px solid #ffffff");
+        $("#renameTagName").focus();
+    }
+  //监听所有的单击事件
+   $(document.body).click(function(e){
+       node = document.elementFromPoint(e.clientX, e.clientY);
+       if(node.tagName == "INPUT"){ //如果是输入框的聚焦，那么就不要进行下去了
+           return;
+       }
+           if($("#renameTagName")[0] != undefined ){//存在renameTagName,则处于编辑状态
+               if($("#renameTagName").val().trim() == tagName){ //如果值一样，则恢复原来的状态
+                   ele.parent().css("border","");
+                   ele.parent().html(tagNameHtml);
+
+               }else{ //否则就要更新tag名称了
+                    if(confirm("是否将标签改为 "+ $("#renameTagName").val().trim())){
+                        $.post(
+                                '<%= update_tag_name_path %>',
+                                {"taggableId":tagId,"taggableType":taggableType,"tagName":tagName,"renameName":$("#renameTagName").val().trim()}
+//                                function(data){
+//                                    ele.parent().css("border","");
+//                                    ele.parent().html(tagNameHtml);
+//                                }
+                        )
+                   }else{
+                       ele.parent().css("border","");
+                       ele.parent().html(tagNameHtml);
+                   }
+               }
+           }
+   });
 
 </script>
 
diff --git a/app/views/tags/_tag_list.html.erb b/app/views/tags/_tag_list.html.erb
index b512f1ef3..49c9b2351 100644
--- a/app/views/tags/_tag_list.html.erb
+++ b/app/views/tags/_tag_list.html.erb
@@ -2,7 +2,8 @@
 
 <% if @tags.size > 0 %>
     <% @tags.each do |tag| %>
-	<span class="re_tag f_l"> <%= link_to tag, :controller => "tags", :action => "index", :q => tag, :object_flag => object_flag, :obj_id => obj.id %>
+	<span class="re_tag f_l"> <%#= link_to tag, :controller => "tags", :action => "index", :q => tag,  :object_flag => object_flag, :obj_id => obj.id %>
+      <a ondblclick="rename_tag($(this),'<%= tag %>',<%= obj.id%>,<%= object_flag%>);"><%= tag %></a>
       <!-- 对用户主页 是本人 ，对项目，需求，问题是管理员 -->
       <% case object_flag %>
 	    <% when '10' %>
diff --git a/config/routes.rb b/config/routes.rb
index 1df7b0d2f..1d2393764 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -884,6 +884,7 @@ RedmineApp::Application.routes.draw do
   match 'tags/remove_tag', :as=>"remove_tag"
   match 'tags/remove_tag_new', :as=>"remove_tag_new"
   match 'tags/tag_save', :as => "save_tag"
+  match 'tags/update_tag_name',:as => "update_tag_name"
 
   match 'words/add_brief_introdution'