diff --git a/app/controllers/applied_project_controller.rb b/app/controllers/applied_project_controller.rb
index f5c42f7b4..f2c0eb056 100644
--- a/app/controllers/applied_project_controller.rb
+++ b/app/controllers/applied_project_controller.rb
@@ -6,13 +6,18 @@ class AppliedProjectController < ApplicationController
     @project = Project.find_by_id(params[:project_id])
     if params[:project_join]
       if @project
-        @applieds = AppliedProject.where("user_id = ? and project_id = ?", params[:user_id],params[:project_id])
-        if  @applieds.count == 0
-          appliedproject = AppliedProject.create(:user_id => params[:user_id], :project_id => params[:project_id])
-          Mailer.applied_project(appliedproject).deliver
-          @status = 2
+        user = User.find @user_id
+        if user.member_of?(@project)
+          @status = 3
         else
-          @status = 1
+          @applieds = AppliedProject.where("user_id = ? and project_id = ?", params[:user_id],params[:project_id])
+          if  @applieds.count == 0
+            appliedproject = AppliedProject.create(:user_id => params[:user_id], :project_id => params[:project_id])
+            Mailer.applied_project(appliedproject).deliver
+            @status = 2
+          else
+            @status = 1
+          end
         end
       else
         @status = 0
diff --git a/app/views/applied_project/applied_join_project.js.erb b/app/views/applied_project/applied_join_project.js.erb
index deac2c9ce..3f4f6aff7 100644
--- a/app/views/applied_project/applied_join_project.js.erb
+++ b/app/views/applied_project/applied_join_project.js.erb
@@ -4,6 +4,8 @@
     alert("请勿重复申请加入该项目");
 <% elsif @status == 2%>
     alert("申请成功");
+<% elsif @status == 3%>
+    alert("您已加入该项目");
 <%else%>
     alert("申请失败");
 <%end%>
\ No newline at end of file