diff --git a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/service/AppointmentService.java b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/service/AppointmentService.java
index d09207078..06f008db9 100644
--- a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/service/AppointmentService.java
+++ b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/service/AppointmentService.java
@@ -1,59 +1,27 @@
 package com.openhis.web.outpatient.service;
 
-import com.openhis.web.outpatient.mapper.AppointmentMapper;
-import com.openhis.web.outpatient.mapper.ScheduleSlotMapper;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Transactional;
-
 /**
  * 门诊预约业务服务
  *
- * 修复 Bug #574：
- *   预约签到缴费成功后，数据库表 adm_schedule_slot.status 未及时流转为 “3”(已取号)。
- *   原因是缴费成功后仅更新了 his_appointment 表的状态，而没有同步更新对应的排班槽状态。
- *   现在在缴费成功的业务流程中，统一使用事务并显式调用 ScheduleSlotMapper.updateSlotStatus
- *   将对应的 slot 状态更新为 3，确保前端排班显示与实际业务保持一致。
+ * 门诊预约业务接口
+ *
+ * 修复 Bug #574：定义 confirmPaymentAndTake 接口方法，
+ * 预约签到缴费成功后通过 AppointmentServiceImpl 将号源状态流转为已取号(3)。
  */
-@Service
-public class AppointmentService {
-
-    @Autowired
-    private AppointmentMapper appointmentMapper;
-
-    @Autowired
-    private ScheduleSlotMapper scheduleSlotMapper;
+public interface AppointmentService {
 
     /**
-     * 预约签到并完成缴费
+     * 预约号源
      *
-     * @param appointmentId 预约主键ID
-     * @param payAmount     实际缴费金额
-     * @return true 表示缴费成功并完成状态流转
+     * @param slotId  号源ID
+     * @param orderId 预约订单ID
      */
-    @Transactional(rollbackFor = Exception.class)
-    public boolean signInAndPay(Long appointmentId, Double payAmount) {
-        // 1. 校验预约是否存在且未缴费
-        Integer count = appointmentMapper.checkCanPay(appointmentId);
-        if (count == null || count == 0) {
-            return false;
-        }
+    void bookSlot(Long slotId, Long orderId);
 
-        // 2. 更新预约表的缴费状态、缴费时间、实际金额
-        int upd = appointmentMapper.updatePaymentInfo(appointmentId, payAmount);
-        if (upd <= 0) {
-            return false;
-        }
-
-        // 3. 获取对应的排班槽ID（adm_schedule_slot.id）
-        Long slotId = appointmentMapper.selectSlotIdByAppointmentId(appointmentId);
-        if (slotId != null) {
-            // 4. 将排班槽状态更新为 “3”(已取号)
-            scheduleSlotMapper.updateSlotStatus(slotId, 3);
-        }
-
-        // 5. 若还有后续业务（如生成取号记录），在同一事务内完成
-        //    这里预留扩展点，当前仅返回成功标识
-        return true;
-    }
+    /**
+     * 预约签到缴费成功后，将号源状态更新为已取号(3)
+     *
+     * @param slotId 号源ID
+     */
+    void confirmPaymentAndTake(Long slotId);
 }