diff --git a/projects/Application/.gitignore b/projects/Application/.gitignore
new file mode 100644
index 00000000..cd5894bd
--- /dev/null
+++ b/projects/Application/.gitignore
@@ -0,0 +1,18 @@
+*.bak
+*.suo
+*.db
+*.db-shm
+*.db-wal
+*.user
+.vs
+obj
+Obj
+bin
+Bin
+debug
+Debug
+release
+Release
+Logs
+logs
+node_modules
\ No newline at end of file
diff --git a/projects/Application/Application.csproj b/projects/Application/Application.csproj
new file mode 100644
index 00000000..123e903a
--- /dev/null
+++ b/projects/Application/Application.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Folder Include="Domain\Entities\" />
+    <Folder Include="Models\" />
+  </ItemGroup>
+
+</Project>
diff --git a/projects/Infrastructure/Domain/ManyToManyAttribute.cs b/projects/Infrastructure/Domain/ManyToManyAttribute.cs
new file mode 100644
index 00000000..246cbb6a
--- /dev/null
+++ b/projects/Infrastructure/Domain/ManyToManyAttribute.cs
@@ -0,0 +1,12 @@
+using System;
+
+namespace Infrastructure.Domain
+{
+    /// <summary>
+    /// 关联实体，只有新建和删除操作，无修改操作
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class)]
+    public class ManyToManyAttribute : Attribute
+    {
+    }
+}
diff --git a/projects/IoTNode/Application/Domain/Entities/RolePermission.cs b/projects/IoTNode/Application/Domain/Entities/RolePermission.cs
index 689a6759..1796f3e0 100644
--- a/projects/IoTNode/Application/Domain/Entities/RolePermission.cs
+++ b/projects/IoTNode/Application/Domain/Entities/RolePermission.cs
@@ -5,6 +5,7 @@ using System.ComponentModel.DataAnnotations;
 namespace Application.Domain.Entities
 {
     [Display(Name = "角色权限")]
+    [ManyToMany]
     public class RolePermission : BaseEntity
     {
         public Guid RoleId { get; set; }
diff --git a/projects/IoTNode/Application/Domain/Entities/UserRole.cs b/projects/IoTNode/Application/Domain/Entities/UserRole.cs
index a38d123c..fedb04e8 100644
--- a/projects/IoTNode/Application/Domain/Entities/UserRole.cs
+++ b/projects/IoTNode/Application/Domain/Entities/UserRole.cs
@@ -5,6 +5,7 @@ using System.ComponentModel.DataAnnotations;
 namespace Application.Domain.Entities
 {
     [Display(Name = "用户角色")]
+    [ManyToMany]
     public class UserRole : BaseEntity
     {
         public Guid UserId { get; set; }
diff --git a/projects/projects.sln b/projects/projects.sln
index 47db2295..3a557ad8 100644
--- a/projects/projects.sln
+++ b/projects/projects.sln
@@ -29,6 +29,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WebSPA", "WebSPA\WebSPA.csp
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "IoTDameon", "IoTDameon\IoTDameon.csproj", "{60596088-3C4E-4EA2-933A-B66CD269845B}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Application", "Application\Application.csproj", "{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -121,12 +123,24 @@ Global
 		{60596088-3C4E-4EA2-933A-B66CD269845B}.Release|iPhone.Build.0 = Release|Any CPU
 		{60596088-3C4E-4EA2-933A-B66CD269845B}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
 		{60596088-3C4E-4EA2-933A-B66CD269845B}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Debug|iPhone.ActiveCfg = Debug|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Release|iPhone.ActiveCfg = Release|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Release|iPhone.Build.0 = Release|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{9AEB7CA3-CB61-40D2-8009-1BA93842FE69}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {0B7095FB-5E70-4EF8-805A-CB4A91AE4B0A}
 		BuildVersion_StartDate = 2000/1/1
+		SolutionGuid = {0B7095FB-5E70-4EF8-805A-CB4A91AE4B0A}
 	EndGlobalSection
 EndGlobal