diff --git a/src/main/java/com/aiassistant/controller/AttachmentController.java b/src/main/java/com/aiassistant/controller/AttachmentController.java
new file mode 100644
index 0000000..6bf2864
--- /dev/null
+++ b/src/main/java/com/aiassistant/controller/AttachmentController.java
@@ -0,0 +1,28 @@
+package com.aiassistant.controller;
+
+import com.aiassistant.model.Attachment;
+import com.aiassistant.service.AttachmentService;
+import com.aiassistant.utils.ResultModel;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/attachment")
+public class AttachmentController {
+    private final AttachmentService attachmentService;
+
+    @Autowired
+    public AttachmentController(AttachmentService attachmentService) {
+        this.attachmentService = attachmentService;
+    }
+
+    @PostMapping("/add")
+    public ResultModel addAttachment(@RequestBody Attachment attachment) {
+        return attachmentService.addAttachment(attachment);
+    }
+
+    @GetMapping("/{id}")
+    public ResultModel getAttachmentById(@PathVariable Integer id) {
+        return attachmentService.getAttachmentById(id);
+    }
+}
diff --git a/src/main/java/com/aiassistant/mapper/AssetAssignMapper.java b/src/main/java/com/aiassistant/mapper/AssetAssignMapper.java
index b38fd76..7cb0c16 100644
--- a/src/main/java/com/aiassistant/mapper/AssetAssignMapper.java
+++ b/src/main/java/com/aiassistant/mapper/AssetAssignMapper.java
@@ -2,7 +2,9 @@
 
 import com.aiassistant.model.AssetAssign;
 import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Mapper;
 
+@Mapper
 public interface AssetAssignMapper {
     @Insert("INSERT INTO asset_assign (asset_id, employee_id, assign_date) VALUES (#{assetId}, #{employeeId}, #{assignDate})")
     void insertAssetAssign(AssetAssign assetAssign);
diff --git a/src/main/java/com/aiassistant/mapper/AttachmentMapper.java b/src/main/java/com/aiassistant/mapper/AttachmentMapper.java
new file mode 100644
index 0000000..6fe3508
--- /dev/null
+++ b/src/main/java/com/aiassistant/mapper/AttachmentMapper.java
@@ -0,0 +1,17 @@
+package com.aiassistant.mapper;
+
+import com.aiassistant.model.Attachment;
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Options;
+import org.apache.ibatis.annotations.Select;
+
+@Mapper
+public interface AttachmentMapper {
+    @Insert("INSERT INTO attachment(name, type, url) VALUES(#{name}, #{type}, #{url})")
+    @Options(useGeneratedKeys = true, keyProperty = "id")
+    void insertAttachment(Attachment attachment);
+
+    @Select("SELECT * FROM attachment WHERE id = #{id}")
+    Attachment selectById(Integer id);
+}
diff --git a/src/main/java/com/aiassistant/mapper/EmployeeMapper.java b/src/main/java/com/aiassistant/mapper/EmployeeMapper.java
index e24ee77..ab49012 100644
--- a/src/main/java/com/aiassistant/mapper/EmployeeMapper.java
+++ b/src/main/java/com/aiassistant/mapper/EmployeeMapper.java
@@ -24,12 +24,4 @@ public interface EmployeeMapper {
     @Delete("DELETE FROM employee WHERE employee_id = #{employeeId}")
     void deleteById(String employeeId);
     
-    /**
-     * 根据员工工号查询员工信息
-     *
-     * @param employeeId
-     * @return
-     */
-    @Select("SELECT * FROM employee WHERE employee_id = #{employeeId}")
-    Employee selectById(String employeeId);
 }
diff --git a/src/main/java/com/aiassistant/model/Attachment.java b/src/main/java/com/aiassistant/model/Attachment.java
new file mode 100644
index 0000000..e70506f
--- /dev/null
+++ b/src/main/java/com/aiassistant/model/Attachment.java
@@ -0,0 +1,31 @@
+package com.aiassistant.model;
+
+public class Attachment {
+    private String name;
+    private String type;
+    private String url;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getType() {
+        return type;
+    }
+
+    public void setType(String type) {
+        this.type = type;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+}
diff --git a/src/main/java/com/aiassistant/service/AttachmentService.java b/src/main/java/com/aiassistant/service/AttachmentService.java
new file mode 100644
index 0000000..0cf977e
--- /dev/null
+++ b/src/main/java/com/aiassistant/service/AttachmentService.java
@@ -0,0 +1,10 @@
+package com.aiassistant.service;
+
+import com.aiassistant.model.Attachment;
+import com.aiassistant.utils.ResultModel;
+
+public interface AttachmentService {
+    ResultModel<Attachment> addAttachment(Attachment attachment);
+
+    ResultModel<Attachment> getAttachmentById(Integer id);
+}
diff --git a/src/main/java/com/aiassistant/service/impl/AssetServiceImpl.java b/src/main/java/com/aiassistant/service/impl/AssetServiceImpl.java
index 5dce63a..193f9a7 100644
--- a/src/main/java/com/aiassistant/service/impl/AssetServiceImpl.java
+++ b/src/main/java/com/aiassistant/service/impl/AssetServiceImpl.java
@@ -83,7 +83,7 @@ public ResultModel<Asset> assignAsset(String assignDate, String employeeId, Stri
         AssetAssign assetAssign = new AssetAssign();
         assetAssign.setAssignDate(assignDate);
         assetAssign.setEmployeeId(employeeId);
-        assetAssign.setAssetId(assetId);
+        assetAssign.setAssetNumber(assetId);
         assetAssignMapper.insertAssetAssign(assetAssign);
 
         return ResultModel.ofSuccess("Asset assigned successfully");
diff --git a/src/main/java/com/aiassistant/service/impl/AttachmentServiceImpl.java b/src/main/java/com/aiassistant/service/impl/AttachmentServiceImpl.java
new file mode 100644
index 0000000..7921269
--- /dev/null
+++ b/src/main/java/com/aiassistant/service/impl/AttachmentServiceImpl.java
@@ -0,0 +1,35 @@
+package com.aiassistant.service.impl;
+
+import com.aiassistant.mapper.AttachmentMapper;
+import com.aiassistant.model.Attachment;
+import com.aiassistant.service.AttachmentService;
+import com.aiassistant.utils.ResultModel;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class AttachmentServiceImpl implements AttachmentService {
+
+    private final AttachmentMapper attachmentMapper;
+
+    @Autowired
+    public AttachmentServiceImpl(AttachmentMapper attachmentMapper) {
+        this.attachmentMapper = attachmentMapper;
+    }
+
+    @Override
+    public ResultModel<Attachment> addAttachment(Attachment attachment) {
+        attachmentMapper.insertAttachment(attachment);
+        return new ResultModel<>(attachment);
+    }
+
+    @Override
+    public ResultModel<Attachment> getAttachmentById(Integer id) {
+        Attachment attachment = attachmentMapper.selectById(id);
+        if (attachment != null) {
+            return new ResultModel<>(attachment);
+        } else {
+            return new ResultModel<>(ResultModel.FAIL, "Attachment not found");
+        }
+    }
+}
\ No newline at end of file