Web 服务在网络通信和网络数据传输中得到广泛应用。在高职高专的应用开发课程中，我们以某市海关电 子卡口系统的升级为案例，说明Web 服务的原理与应用，并以该系统Web 服务模块的模拟程序作为实训任务，引导学生进行 Web 服务开发的实践，取得了良好的教学效果。

Web service is widely used in network communication and network data transfer. In the application development courses of higher vocational college computer specialty, we use a customs electronic checkpost system as a case to illustrate the principle and application of Web Services. We further assign the task of simulating the Web services modules of the system for practical training. The teaching effect is good.