diff --git a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/change/convertor/QualFilingChangeCmdConvertor.java b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/change/convertor/QualFilingChangeCmdConvertor.java
index 5a1bfa5..c0a2b66 100644
--- a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/change/convertor/QualFilingChangeCmdConvertor.java
+++ b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/change/convertor/QualFilingChangeCmdConvertor.java
@@ -1,12 +1,16 @@
 package org.qinan.safetyeval.app.change.convertor;
 
+import com.alibaba.fastjson.JSON;
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
+import org.mapstruct.Named;
 import org.qinan.safetyeval.client.co.QualFilingChangeAggregationCO;
 import org.qinan.safetyeval.client.dto.QualFilingChangeAddCmd;
 import org.qinan.safetyeval.domain.entity.QualFilingChangeEntity;
 import org.qinan.safetyeval.domain.entity.QualFilingEntity;
 
+import java.util.List;
+
 /**
  * 备案变更基本信息命令转换
  *
@@ -21,6 +25,7 @@ public interface QualFilingChangeCmdConvertor {
      * @param qualFilingChangeAddCmd
      * @return
      */
+    @Mapping(target = "businessScope", source = "businessScope", qualifiedByName = "listToJsonString")
     QualFilingChangeEntity convertCmdToE(QualFilingChangeAddCmd qualFilingChangeAddCmd);
 
     /**
@@ -41,5 +46,16 @@ public interface QualFilingChangeCmdConvertor {
      * @param changeEntity changeEntity
      * @return QualFilingChangeAggregationCO
      */
+    @Mapping(target = "businessScope", source = "businessScope", qualifiedByName = "jsonStringToList")
     QualFilingChangeAggregationCO convertChangeEToQualFilingChangeAggregationCO(QualFilingChangeEntity changeEntity);
+
+    @Named("listToJsonString")
+    default String listToJsonString(List<String> list) {
+        return list == null ? null : JSON.toJSONString(list);
+    }
+
+    @Named("jsonStringToList")
+    default List<String> jsonStringToList(String json) {
+        return json == null || json.isEmpty() ? null : JSON.parseArray(json, String.class);
+    }
 }
diff --git a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/QualFilingChangeExecutor.java b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/QualFilingChangeExecutor.java
index 0ffcda9..24d4a79 100644
--- a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/QualFilingChangeExecutor.java
+++ b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/QualFilingChangeExecutor.java
@@ -2,6 +2,7 @@ package org.qinan.safetyeval.app.executor;
 
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.alibaba.fastjson.JSON;
 import org.qinan.safetyeval.app.change.convertor.*;
 import org.qinan.safetyeval.app.orchestrator.QualFilingOrchestrator;
 import org.qinan.safetyeval.client.api.QualFilingChangeApi;
@@ -99,7 +100,7 @@ public class QualFilingChangeExecutor implements QualFilingChangeApi {
         entity.setFilingUnitTypeCode(cmd.getFilingUnitTypeCode());
         entity.setFilingUnitTypeName(cmd.getFilingUnitTypeName());
         entity.setFilingNo(cmd.getFilingNo());
-        entity.setBusinessScope(cmd.getBusinessScope());
+        entity.setBusinessScope(JSON.toJSONString(cmd.getBusinessScope()));
         entity.setRegisterAddress(cmd.getRegisterAddress());
         entity.setOfficeAddress(cmd.getOfficeAddress());
         entity.setCreditCode(cmd.getCreditCode());
@@ -137,7 +138,7 @@ public class QualFilingChangeExecutor implements QualFilingChangeApi {
         entity.setFilingUnitTypeCode(cmd.getFilingUnitTypeCode());
         entity.setFilingUnitTypeName(cmd.getFilingUnitTypeName());
         entity.setFilingNo(cmd.getFilingNo());
-        entity.setBusinessScope(cmd.getBusinessScope());
+        entity.setBusinessScope(JSON.toJSONString(cmd.getBusinessScope()));
         entity.setRegisterAddress(cmd.getRegisterAddress());
         entity.setOfficeAddress(cmd.getOfficeAddress());
         entity.setCreditCode(cmd.getCreditCode());
@@ -650,7 +651,7 @@ public class QualFilingChangeExecutor implements QualFilingChangeApi {
         co.setFilingUnitTypeCode(entity.getFilingUnitTypeCode());
         co.setFilingUnitTypeName(entity.getFilingUnitTypeName());
         co.setFilingNo(entity.getFilingNo());
-        co.setBusinessScope(entity.getBusinessScope());
+        co.setBusinessScope(JSON.parseArray(entity.getBusinessScope(), String.class));
         co.setRegisterAddress(entity.getRegisterAddress());
         co.setOfficeAddress(entity.getOfficeAddress());
         co.setCreditCode(entity.getCreditCode());
diff --git a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/QualFilingExecutor.java b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/QualFilingExecutor.java
index 7cc8b4a..b76c72c 100644
--- a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/QualFilingExecutor.java
+++ b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/executor/QualFilingExecutor.java
@@ -1,6 +1,7 @@
 package org.qinan.safetyeval.app.executor;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.alibaba.fastjson.JSON;
 import org.qinan.safetyeval.app.orchestrator.QualFilingOrchestrator;
 import org.qinan.safetyeval.client.api.QualFilingApi;
 import org.qinan.safetyeval.client.change.request.QualFilingCommitmentChangeAddCmd;
@@ -68,7 +69,7 @@ public class QualFilingExecutor implements QualFilingApi {
         entity.setFilingUnitTypeCode(cmd.getFilingUnitTypeCode());
         entity.setFilingUnitTypeName(cmd.getFilingUnitTypeName());
         entity.setFilingNo(cmd.getFilingNo());
-        entity.setBusinessScope(cmd.getBusinessScope());
+        entity.setBusinessScope(JSON.toJSONString(cmd.getBusinessScope()));
         entity.setRegisterAddress(cmd.getRegisterAddress());
         entity.setOfficeAddress(cmd.getOfficeAddress());
         entity.setCreditCode(cmd.getCreditCode());
@@ -167,6 +168,7 @@ public class QualFilingExecutor implements QualFilingApi {
         // 拷贝基本信息
         QualFilingEntity entity = new QualFilingEntity();
         BeanUtils.copyProperties(cmd.getQualFilingAddCmd(),entity);
+        entity.setBusinessScope(JSON.toJSONString(cmd.getQualFilingAddCmd().getBusinessScope()));
         //备案承诺书
         QualFilingCommitmentEntity commitmentEntity = new QualFilingCommitmentEntity();
         BeanUtils.copyProperties(cmd.getQualFilingCommitmentAddCmd(),commitmentEntity);
@@ -213,6 +215,7 @@ public class QualFilingExecutor implements QualFilingApi {
             QualFilingDO qualFilingDO = qualFilingMapper.selectById(cmd.getFilingId());
             QualFilingChangeAddCmd qualFilingChangeAddCmd = new QualFilingChangeAddCmd();
             BeanUtils.copyProperties(qualFilingDO, qualFilingChangeAddCmd, "id");
+            qualFilingChangeAddCmd.setBusinessScope(JSON.parseArray(qualFilingDO.getBusinessScope(), String.class));
             qualFilingChangeAddCmd.setFilingId(qualFilingDO.getId());
             cmdSync.setQualFilingChangeAddCmd(qualFilingChangeAddCmd);
             // 备案承诺书
@@ -267,7 +270,7 @@ public class QualFilingExecutor implements QualFilingApi {
         co.setFilingUnitTypeCode(entity.getFilingUnitTypeCode());
         co.setFilingUnitTypeName(entity.getFilingUnitTypeName());
         co.setFilingNo(entity.getFilingNo());
-        co.setBusinessScope(entity.getBusinessScope());
+        co.setBusinessScope(JSON.parseArray(entity.getBusinessScope(), String.class));
         co.setRegisterAddress(entity.getRegisterAddress());
         co.setOfficeAddress(entity.getOfficeAddress());
         co.setCreditCode(entity.getCreditCode());
diff --git a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/orchestrator/QualFilingOrchestrator.java b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/orchestrator/QualFilingOrchestrator.java
index 0ae888c..c508889 100644
--- a/safety-eval-app/src/main/java/org/qinan/safetyeval/app/orchestrator/QualFilingOrchestrator.java
+++ b/safety-eval-app/src/main/java/org/qinan/safetyeval/app/orchestrator/QualFilingOrchestrator.java
@@ -1,6 +1,8 @@
 package org.qinan.safetyeval.app.orchestrator;
 
+import cn.hutool.json.JSONUtil;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.alibaba.fastjson.JSON;
 import org.qinan.safetyeval.app.support.*;
 import org.qinan.safetyeval.client.co.*;
 import org.qinan.safetyeval.client.dto.QualFilingModifyCmd;
@@ -616,7 +618,7 @@ public class QualFilingOrchestrator {
             entity.setFilingNo(cmd.getFilingNo());
         }
         if (cmd.getBusinessScope() != null) {
-            entity.setBusinessScope(cmd.getBusinessScope());
+            entity.setBusinessScope(JSONUtil.toJsonStr(cmd.getBusinessScope()));
         }
         if (cmd.getRegisterAddress() != null) {
             entity.setRegisterAddress(cmd.getRegisterAddress());
@@ -692,7 +694,7 @@ public class QualFilingOrchestrator {
         co.setFilingUnitTypeCode(entity.getFilingUnitTypeCode());
         co.setFilingUnitTypeName(entity.getFilingUnitTypeName());
         co.setFilingNo(entity.getFilingNo());
-        co.setBusinessScope(entity.getBusinessScope());
+        co.setBusinessScope(JSON.parseArray(entity.getBusinessScope(), String.class));
         co.setRegisterAddress(entity.getRegisterAddress());
         co.setOfficeAddress(entity.getOfficeAddress());
         co.setCreditCode(entity.getCreditCode());
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/co/QualFilingCO.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/co/QualFilingCO.java
index 42c8046..3c85c2e 100644
--- a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/co/QualFilingCO.java
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/co/QualFilingCO.java
@@ -3,9 +3,11 @@ package org.qinan.safetyeval.client.co;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
+import org.qinan.safetyeval.domain.constant.IndustryEnum;
 import org.springframework.format.annotation.DateTimeFormat;
 
 import java.math.BigDecimal;
+import java.util.List;
 
 /**
  * 资质备案申请CO（Client Object）
@@ -37,7 +39,7 @@ public class QualFilingCO {
     private String filingNo;
 
     @ApiModelProperty(value = "经营范围")
-    private String businessScope;
+    private List<String> businessScope;
 
     @ApiModelProperty(value = "注册地址")
     private String registerAddress;
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/co/QualFilingChangeCO.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/co/QualFilingChangeCO.java
index 995f548..069ef83 100644
--- a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/co/QualFilingChangeCO.java
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/co/QualFilingChangeCO.java
@@ -1,6 +1,8 @@
 package org.qinan.safetyeval.client.co;
 
 import java.math.BigDecimal;
+import java.util.List;
+
 import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
 
@@ -43,7 +45,7 @@ public class QualFilingChangeCO {
     private String filingNo;
 
     @ApiModelProperty(value = "经营范围")
-    private String businessScope;
+    private List<String> businessScope;
 
     @ApiModelProperty(value = "注册地址")
     private String registerAddress;
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingAddCmd.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingAddCmd.java
index 81e12db..41d157a 100644
--- a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingAddCmd.java
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingAddCmd.java
@@ -4,6 +4,7 @@ import io.swagger.annotations.ApiModelProperty;
 import lombok.Data;
 
 import java.math.BigDecimal;
+import java.util.List;
 
 /**
  * 资质备案申请新增命令
@@ -35,7 +36,7 @@ public class QualFilingAddCmd {
     private String filingNo;
 
     @ApiModelProperty(value = "备案安全评价业务范围")
-    private String businessScope;
+    private List<String> businessScope;
 
     @ApiModelProperty(value = "注册地址")
     private String registerAddress;
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingChangeAddCmd.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingChangeAddCmd.java
index e2de96a..390accb 100644
--- a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingChangeAddCmd.java
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingChangeAddCmd.java
@@ -8,6 +8,7 @@ import javax.validation.constraints.Max;
 import javax.validation.constraints.NotNull;
 import javax.validation.constraints.Size;
 import java.math.BigDecimal;
+import java.util.List;
 
 /**
  * 备案变更新增命令
@@ -54,8 +55,7 @@ public class QualFilingChangeAddCmd {
     private String filingNo;
 
     @ApiModelProperty(value = "备案安全评价业务范围")
-    @Size(max = 512, message = "备案安全评价业务范围不能超过512个字符")
-    private String businessScope;
+    private List<String> businessScope;
 
     @ApiModelProperty(value = "注册地址")
     @Size(max = 128, message = "注册地址不能超过128个字符")
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingChangeModifyCmd.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingChangeModifyCmd.java
index f874448..8538a27 100644
--- a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingChangeModifyCmd.java
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingChangeModifyCmd.java
@@ -2,6 +2,8 @@ package org.qinan.safetyeval.client.dto;
 
 import io.swagger.annotations.ApiModelProperty;
 import java.math.BigDecimal;
+import java.util.List;
+
 import lombok.Data;
 
 /**
@@ -37,7 +39,7 @@ public class QualFilingChangeModifyCmd {
     private String filingNo;
 
     @ApiModelProperty(value = "备案安全评价业务范围")
-    private String businessScope;
+    private List<String> businessScope;
 
     @ApiModelProperty(value = "注册地址")
     private String registerAddress;
diff --git a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingModifyCmd.java b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingModifyCmd.java
index fc3c07a..d41d436 100644
--- a/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingModifyCmd.java
+++ b/safety-eval-client/src/main/java/org/qinan/safetyeval/client/dto/QualFilingModifyCmd.java
@@ -2,6 +2,7 @@ package org.qinan.safetyeval.client.dto;
 
 import io.swagger.annotations.ApiModelProperty;
 import java.math.BigDecimal;
+import java.util.List;
 import lombok.Data;
 
 /**
@@ -34,7 +35,7 @@ public class QualFilingModifyCmd {
     private String filingNo;
 
     @ApiModelProperty(value = "备案安全评价业务范围")
-    private String businessScope;
+    private List<String> businessScope;
 
     @ApiModelProperty(value = "注册地址")
     private String registerAddress;
diff --git a/safety-eval-infrastructure/src/main/java/org/qinan/safetyeval/infrastructure/handler/JsonStringListTypeHandler.java b/safety-eval-infrastructure/src/main/java/org/qinan/safetyeval/infrastructure/handler/JsonStringListTypeHandler.java
new file mode 100644
index 0000000..1002edf
--- /dev/null
+++ b/safety-eval-infrastructure/src/main/java/org/qinan/safetyeval/infrastructure/handler/JsonStringListTypeHandler.java
@@ -0,0 +1,54 @@
+package org.qinan.safetyeval.infrastructure.handler;
+
+import com.alibaba.fastjson.JSON;
+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 java.sql.CallableStatement;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * MyBatis TypeHandler: 在数据库的 varchar/text 列中以 JSON 数组字符串形式存储 List<String>。
+ * <p>
+ * 入库: List<String> -> JSON.toJSONString -> String
+ * 出库: String -> JSON.parseArray -> List<String>
+ *
+ * @author safety-eval
+ */
+@MappedJdbcTypes(JdbcType.VARCHAR)
+@MappedTypes(List.class)
+public class JsonStringListTypeHandler extends BaseTypeHandler<List<String>> {
+
+    @Override
+    public void setNonNullParameter(PreparedStatement ps, int i, List<String> parameter, JdbcType jdbcType) throws SQLException {
+        ps.setString(i, JSON.toJSONString(parameter));
+    }
+
+    @Override
+    public List<String> getNullableResult(ResultSet rs, String columnName) throws SQLException {
+        return parse(rs.getString(columnName));
+    }
+
+    @Override
+    public List<String> getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
+        return parse(rs.getString(columnIndex));
+    }
+
+    @Override
+    public List<String> getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
+        return parse(cs.getString(columnIndex));
+    }
+
+    private List<String> parse(String json) {
+        if (json == null || json.isEmpty()) {
+            return Collections.emptyList();
+        }
+        return JSON.parseArray(json, String.class);
+    }
+}
diff --git a/safety-eval-infrastructure/src/main/resources/mapper/QualFilingMapper.xml b/safety-eval-infrastructure/src/main/resources/mapper/QualFilingMapper.xml
index 3d6922e..37512a8 100644
--- a/safety-eval-infrastructure/src/main/resources/mapper/QualFilingMapper.xml
+++ b/safety-eval-infrastructure/src/main/resources/mapper/QualFilingMapper.xml
@@ -53,7 +53,13 @@
         `id`, `org_id`, `filing_territory_code`, `filing_territory_name`, `filing_unit_name`, `filing_unit_type_code`, `filing_unit_type_name`, `filing_no`, `business_scope`, `register_address`, `office_address`, `credit_code`, `qual_cert_no`, `legal_person_phone`, `contact_phone`, `info_disclosure_url`, `fixed_asset_amount`, `archive_room_area`, `fulltime_evaluator_count`, `registered_engineer_count`, `workplace_area`, `unit_intro`, `attachment_url`, `origin_filing_id`, `reject_reason`, `submit_time`, `approve_time`, `filing_status_code`, `filing_status_name`, `apply_type_code`, `apply_type_name`, `delete_enum`, `remarks`, `create_name`, `update_name`, `tenant_id`, `version`, `create_time`, `update_time`, `create_id`, `update_id`, `env`
     </sql>
 
-    <select id="qualificationMonitoringPage" resultType="org.qinan.safetyeval.client.co.QualFilingCO">
+    <!-- CO查询映射结果（business_scope 以 JSON 数组字符串存储，出库时转换为 List<String>） -->
+    <resultMap id="QualFilingCOResultMap" type="org.qinan.safetyeval.client.co.QualFilingCO" autoMapping="true">
+        <result column="business_scope" property="businessScope"
+                typeHandler="org.qinan.safetyeval.infrastructure.handler.JsonStringListTypeHandler"/>
+    </resultMap>
+
+    <select id="qualificationMonitoringPage" resultMap="QualFilingCOResultMap">
         select info.credit_code as creditCode, info.unit_name as unitName, filing.*  from org_info as info
             left join qual_filing as filing on info.id = filing.org_id
         where 1=1