diff --git a/src/main/java/com/yolo/keyborad/mapper/KeyboardUserThemesMapper.java b/src/main/java/com/yolo/keyborad/mapper/KeyboardUserThemesMapper.java
new file mode 100644
index 0000000..5019da1
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/mapper/KeyboardUserThemesMapper.java
@@ -0,0 +1,12 @@
+package com.yolo.keyborad.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.yolo.keyborad.model.entity.KeyboardUserThemes;
+
+/*
+* @author: ziin
+* @date: 2025/12/11 13:31
+*/
+    
+public interface KeyboardUserThemesMapper extends BaseMapper<KeyboardUserThemes> {
+}
\ No newline at end of file
diff --git a/src/main/java/com/yolo/keyborad/model/entity/KeyboardThemes.java b/src/main/java/com/yolo/keyborad/model/entity/KeyboardThemes.java
index 9f8cd3b..dc8c2a6 100644
--- a/src/main/java/com/yolo/keyborad/model/entity/KeyboardThemes.java
+++ b/src/main/java/com/yolo/keyborad/model/entity/KeyboardThemes.java
@@ -8,6 +8,8 @@ import com.yolo.keyborad.typehandler.StringArrayTypeHandler;
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.math.BigDecimal;
 import java.util.Date;
+import java.util.List;
+
 import lombok.Data;
 
 /*
@@ -31,9 +33,9 @@ public class KeyboardThemes {
     @Schema(description="键盘价格")
     private BigDecimal themePrice;
 
-    @TableField(value = "theme_tag", typeHandler = StringArrayTypeHandler.class)
+    @TableField(value = "theme_tag")
     @Schema(description="主题标签")
-    private String[] themeTag;
+    private List<ThemeTagItem> themeTag;
 
     @TableField(value = "theme_download")
     @Schema(description="主题下载次数")
diff --git a/src/main/java/com/yolo/keyborad/model/entity/KeyboardUserThemes.java b/src/main/java/com/yolo/keyborad/model/entity/KeyboardUserThemes.java
new file mode 100644
index 0000000..a56daa7
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/model/entity/KeyboardUserThemes.java
@@ -0,0 +1,61 @@
+package com.yolo.keyborad.model.entity;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import io.swagger.v3.oas.annotations.media.Schema;
+import java.util.Date;
+import lombok.Data;
+
+/*
+* @author: ziin
+* @date: 2025/12/11 13:31
+*/
+    
+@Schema
+@Data
+@TableName(value = "keyboard_user_themes")
+public class KeyboardUserThemes {
+    /**
+     * 主键 id
+     */
+    @TableId(value = "id", type = IdType.AUTO)
+    @Schema(description="主键 id")
+    private Long id;
+
+    /**
+     * 主题主键
+     */
+    @TableField(value = "theme_id")
+    @Schema(description="主题主键")
+    private Long themeId;
+
+    /**
+     * 用户 Id
+     */
+    @TableField(value = "user_id")
+    @Schema(description="用户 Id")
+    private Long userId;
+
+    /**
+     * 创建时间
+     */
+    @TableField(value = "created_at")
+    @Schema(description="创建时间")
+    private Date createdAt;
+
+    /**
+     * 是否从显示移除
+     */
+    @TableField(value = "view_deleted")
+    @Schema(description="是否从显示移除")
+    private Boolean viewDeleted;
+
+    /**
+     * 更新时间
+     */
+    @TableField(value = "updated_at")
+    @Schema(description="更新时间")
+    private Boolean updatedAt;
+}
\ No newline at end of file
diff --git a/src/main/java/com/yolo/keyborad/model/entity/ThemeTagItem.java b/src/main/java/com/yolo/keyborad/model/entity/ThemeTagItem.java
new file mode 100644
index 0000000..57be423
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/model/entity/ThemeTagItem.java
@@ -0,0 +1,10 @@
+package com.yolo.keyborad.model.entity;
+
+import lombok.Data;
+
+// ThemeTagItem.java
+@Data
+public class ThemeTagItem {
+    private String label;
+    private String color;
+}
diff --git a/src/main/java/com/yolo/keyborad/model/vo/themes/KeyboardThemesRespVO.java b/src/main/java/com/yolo/keyborad/model/vo/themes/KeyboardThemesRespVO.java
index 21296af..428e289 100644
--- a/src/main/java/com/yolo/keyborad/model/vo/themes/KeyboardThemesRespVO.java
+++ b/src/main/java/com/yolo/keyborad/model/vo/themes/KeyboardThemesRespVO.java
@@ -1,9 +1,11 @@
 package com.yolo.keyborad.model.vo.themes;
 
+import com.yolo.keyborad.model.entity.ThemeTagItem;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Data;
 
 import java.math.BigDecimal;
+import java.util.List;
 
 /*
  * @author: ziin
@@ -34,7 +36,7 @@ public class KeyboardThemesRespVO {
      * 主题标签
      */
     @Schema(description = "主题标签")
-    private String[] themeTag;
+    private List<ThemeTagItem> themeTag;
 
     /**
      * 主题下载次数
diff --git a/src/main/java/com/yolo/keyborad/service/KeyboardUserThemesService.java b/src/main/java/com/yolo/keyborad/service/KeyboardUserThemesService.java
new file mode 100644
index 0000000..a73dd3e
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/service/KeyboardUserThemesService.java
@@ -0,0 +1,13 @@
+package com.yolo.keyborad.service;
+
+import com.yolo.keyborad.model.entity.KeyboardUserThemes;
+import com.baomidou.mybatisplus.extension.service.IService;
+    /*
+* @author: ziin
+* @date: 2025/12/11 13:31
+*/
+    
+public interface KeyboardUserThemesService extends IService<KeyboardUserThemes>{
+
+
+}
diff --git a/src/main/java/com/yolo/keyborad/service/impl/KeyboardThemePurchaseServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/KeyboardThemePurchaseServiceImpl.java
index 6b4f58a..39e9adb 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/KeyboardThemePurchaseServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/KeyboardThemePurchaseServiceImpl.java
@@ -3,12 +3,14 @@ package com.yolo.keyborad.service.impl;
 import com.yolo.keyborad.common.ErrorCode;
 import com.yolo.keyborad.exception.BusinessException;
 import com.yolo.keyborad.model.entity.KeyboardThemes;
+import com.yolo.keyborad.model.entity.KeyboardUserThemes;
 import com.yolo.keyborad.model.entity.KeyboardUserWallet;
 import com.yolo.keyborad.model.entity.KeyboardWalletTransaction;
 import com.yolo.keyborad.model.vo.purchase.ThemePurchaseListRespVO;
 import com.yolo.keyborad.model.vo.purchase.ThemePurchaseRespVO;
 import com.yolo.keyborad.model.vo.themes.KeyboardThemesRespVO;
 import com.yolo.keyborad.service.KeyboardThemesService;
+import com.yolo.keyborad.service.KeyboardUserThemesService;
 import com.yolo.keyborad.service.KeyboardUserWalletService;
 import com.yolo.keyborad.service.KeyboardWalletTransactionService;
 import jakarta.annotation.Resource;
@@ -42,6 +44,9 @@ public class KeyboardThemePurchaseServiceImpl extends ServiceImpl<KeyboardThemeP
     @Resource
     private KeyboardWalletTransactionService transactionService;
 
+    @Resource
+    private KeyboardUserThemesService userThemesService;
+
     @Override
     @Transactional(rollbackFor = Exception.class)
     public ThemePurchaseRespVO purchaseTheme(Long userId, Long themeId) {
@@ -135,7 +140,15 @@ public class KeyboardThemePurchaseServiceImpl extends ServiceImpl<KeyboardThemeP
         purchase.setWalletTxId(transaction.getId());
         this.updateById(purchase);
 
-        // 9. 构造返回结果
+        // 9. 添加到用户主题表
+        KeyboardUserThemes userTheme = new KeyboardUserThemes();
+        userTheme.setUserId(userId);
+        userTheme.setThemeId(themeId);
+        userTheme.setCreatedAt(new Date());
+        userTheme.setViewDeleted(false);
+        userThemesService.save(userTheme);
+
+        // 10. 构造返回结果
         // 创建响应对象，封装购买结果信息
         ThemePurchaseRespVO respVO = new ThemePurchaseRespVO();
         respVO.setOrderNo(orderNo);                             // 订单号
diff --git a/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserThemesServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserThemesServiceImpl.java
new file mode 100644
index 0000000..9f70902
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/service/impl/KeyboardUserThemesServiceImpl.java
@@ -0,0 +1,18 @@
+package com.yolo.keyborad.service.impl;
+
+import org.springframework.stereotype.Service;
+import org.springframework.beans.factory.annotation.Autowired;
+import java.util.List;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.yolo.keyborad.model.entity.KeyboardUserThemes;
+import com.yolo.keyborad.mapper.KeyboardUserThemesMapper;
+import com.yolo.keyborad.service.KeyboardUserThemesService;
+/*
+* @author: ziin
+* @date: 2025/12/11 13:31
+*/
+    
+@Service
+public class KeyboardUserThemesServiceImpl extends ServiceImpl<KeyboardUserThemesMapper, KeyboardUserThemes> implements KeyboardUserThemesService{
+
+}
diff --git a/src/main/java/com/yolo/keyborad/typehandler/ThemeTagTypeHandler.java b/src/main/java/com/yolo/keyborad/typehandler/ThemeTagTypeHandler.java
new file mode 100644
index 0000000..00bb694
--- /dev/null
+++ b/src/main/java/com/yolo/keyborad/typehandler/ThemeTagTypeHandler.java
@@ -0,0 +1,67 @@
+// ThemeTagTypeHandler.java
+package com.yolo.keyborad.typehandler;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.yolo.keyborad.model.entity.ThemeTagItem;
+import org.apache.ibatis.type.BaseTypeHandler;
+import org.apache.ibatis.type.JdbcType;
+import org.apache.ibatis.type.MappedJdbcTypes;
+import org.apache.ibatis.type.MappedTypes;
+import org.postgresql.util.PGobject;
+
+import java.sql.*;
+import java.util.List;
+
+@MappedTypes(List.class)
+@MappedJdbcTypes(JdbcType.OTHER)   // PostgreSQL jsonb = OTHER
+public class ThemeTagTypeHandler extends BaseTypeHandler<List<ThemeTagItem>> {
+
+    private static final ObjectMapper MAPPER = new ObjectMapper();
+
+    @Override
+    public void setNonNullParameter(PreparedStatement ps, int i,
+                                    List<ThemeTagItem> parameter,
+                                    JdbcType jdbcType) throws SQLException {
+        try {
+            String json = MAPPER.writeValueAsString(parameter);
+
+            PGobject pgObject = new PGobject();
+            pgObject.setType("jsonb");
+            pgObject.setValue(json);
+
+            ps.setObject(i, pgObject);
+        } catch (Exception e) {
+            throw new SQLException("Failed to convert themeTag to jsonb", e);
+        }
+    }
+
+    @Override
+    public List<ThemeTagItem> getNullableResult(ResultSet rs, String columnName) throws SQLException {
+        String json = rs.getString(columnName);
+        return parseJson(json);
+    }
+
+    @Override
+    public List<ThemeTagItem> getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
+        String json = rs.getString(columnIndex);
+        return parseJson(json);
+    }
+
+    @Override
+    public List<ThemeTagItem> getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
+        String json = cs.getString(columnIndex);
+        return parseJson(json);
+    }
+
+    private List<ThemeTagItem> parseJson(String json) throws SQLException {
+        if (json == null) {
+            return null;
+        }
+        try {
+            return MAPPER.readValue(json, new TypeReference<List<ThemeTagItem>>() {});
+        } catch (Exception e) {
+            throw new SQLException("Failed to parse jsonb to List<ThemeTagItem>: " + json, e);
+        }
+    }
+}
diff --git a/src/main/resources/mapper/KeyboardThemesMapper.xml b/src/main/resources/mapper/KeyboardThemesMapper.xml
index 19c3a90..b27d5b3 100644
--- a/src/main/resources/mapper/KeyboardThemesMapper.xml
+++ b/src/main/resources/mapper/KeyboardThemesMapper.xml
@@ -7,7 +7,7 @@
     <id column="id" jdbcType="BIGINT" property="id" />
     <result column="theme_name" jdbcType="VARCHAR" property="themeName" />
     <result column="theme_price" jdbcType="NUMERIC" property="themePrice" />
-    <result column="theme_tag" jdbcType="ARRAY" property="themeTag" typeHandler="com.yolo.keyborad.typehandler.StringArrayTypeHandler" />
+    <result column="theme_tag" jdbcType="VARCHAR" property="themeTag"/>
     <result column="theme_download" jdbcType="VARCHAR" property="themeDownload" />
     <result column="theme_style" jdbcType="BIGINT" property="themeStyle" />
     <result column="theme_status" jdbcType="BOOLEAN" property="themeStatus" />
diff --git a/src/main/resources/mapper/KeyboardUserThemesMapper.xml b/src/main/resources/mapper/KeyboardUserThemesMapper.xml
new file mode 100644
index 0000000..4a7eb28
--- /dev/null
+++ b/src/main/resources/mapper/KeyboardUserThemesMapper.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.yolo.keyborad.mapper.KeyboardUserThemesMapper">
+  <resultMap id="BaseResultMap" type="com.yolo.keyborad.model.entity.KeyboardUserThemes">
+    <!--@mbg.generated-->
+    <!--@Table keyboard_user_themes-->
+    <id column="id" jdbcType="BIGINT" property="id" />
+    <result column="theme_id" jdbcType="BIGINT" property="themeId" />
+    <result column="user_id" jdbcType="BIGINT" property="userId" />
+    <result column="created_at" jdbcType="TIMESTAMP" property="createdAt" />
+    <result column="view_deleted" jdbcType="BOOLEAN" property="viewDeleted" />
+    <result column="updated_at" jdbcType="BOOLEAN" property="updatedAt" />
+  </resultMap>
+  <sql id="Base_Column_List">
+    <!--@mbg.generated-->
+    id, theme_id, user_id, created_at, view_deleted, updated_at
+  </sql>
+</mapper>
\ No newline at end of file