diff --git a/bonus-modules/bonus-smart-canteen/src/main/resources/mapper/kitchen/KitchenDeviceInfoMapper.xml b/bonus-modules/bonus-smart-canteen/src/main/resources/mapper/kitchen/KitchenDeviceInfoMapper.xml
index 8c4f6f7..92f4484 100644
--- a/bonus-modules/bonus-smart-canteen/src/main/resources/mapper/kitchen/KitchenDeviceInfoMapper.xml
+++ b/bonus-modules/bonus-smart-canteen/src/main/resources/mapper/kitchen/KitchenDeviceInfoMapper.xml
@@ -97,6 +97,9 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
             <if test="deviceType !=0">
                 and device_type = #{deviceType}
             </if>
+            <if test="deviceSn != null and deviceSn != ''">
+                and device_sn = #{deviceSn}
+            </if>
         </where>
     </select>