diff --git a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/mapper/AppointmentMapper.java b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/mapper/AppointmentMapper.java
index ead5e0f42..07e81784e 100644
--- a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/mapper/AppointmentMapper.java
+++ b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/mapper/AppointmentMapper.java
@@ -10,6 +10,7 @@ import org.apache.ibatis.annotations.Mapper;
  * 新增：
  *   - updateSlotStatus：在预约缴费成功后，将对应的排班时段状态更新为 “3”(已取号)。
  *   - resetSlotStatus：在门诊诊前退号（取消预约）后，将对应的排班时段状态恢复为 “1”(已预约)。
+ *   - incrementBookedNum：在预约成功后，实时累加排班池（adm_schedule_pool）中的 booked_num。
  *
  * 说明：
  *   status 字段含义（参考 PRD）：
@@ -41,4 +42,18 @@ public interface AppointmentMapper {
      */
     @Update("UPDATE adm_schedule_slot SET status = 1 WHERE id = #{slotId}")
     int resetSlotStatus(@Param("slotId") Long slotId);
+
+    /**
+     * 预约成功后，实时累加对应排班池的已预约人数（booked_num）。
+     * 通过 slotId 关联到 adm_schedule_pool 表的 id（pool_id）。
+     *
+     * @param slotId   排班时段主键
+     * @return 受影响的行数
+     */
+    @Update({
+        "UPDATE adm_schedule_pool",
+        "SET booked_num = booked_num + 1",
+        "WHERE id = (SELECT pool_id FROM adm_schedule_slot WHERE id = #{slotId})"
+    })
+    int incrementBookedNum(@Param("slotId") Long slotId);
 }
diff --git a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/service/impl/AppointmentServiceImpl.java b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/service/impl/AppointmentServiceImpl.java
index dadacbb5a..cb787f532 100644
--- a/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/service/impl/AppointmentServiceImpl.java
+++ b/openhis-server-new/openhis-application/src/main/java/com/openhis/web/outpatient/service/impl/AppointmentServiceImpl.java
@@ -18,6 +18,11 @@ import org.springframework.transaction.annotation.Transactional;
  *        将状态置为 3。
  *     2. 将该更新操作放在同一事务中，确保支付成功后状态一定会被更新，
  *        若后续出现异常则回滚，保持数据一致性。
+ *
+ * 新增修复 Bug #575：
+ *   预约成功后，adm_schedule_pool 表的 booked_num 未实时累加，导致排班容量统计不准确。
+ *   在支付成功的同一事务中，调用 AppointmentMapper.incrementBookedNum
+ *   对对应的排班池进行原子递增。
  */
 @Service
 public class AppointmentServiceImpl {
@@ -48,5 +53,12 @@ public class AppointmentServiceImpl {
             // 若未成功更新，抛出异常回滚事务，防止出现状态不一致
             throw new IllegalStateException("Failed to update schedule slot status to '已取号' for slotId: " + slotId);
         }
+
+        // 3. 实时累加排班池已预约人数（booked_num）
+        int poolUpdated = appointmentMapper.incrementBookedNum(slotId);
+        if (poolUpdated != 1) {
+            // 若未成功更新，抛出异常回滚事务，确保预约人数统计准确
+            throw new IllegalStateException("Failed to increment booked_num for schedule pool related to slotId: " + slotId);
+        }
     }
 }