With an experiment of microwave heating on water in a waveguide system, the collected data of the voltage reflection coefficient and the temperatures at different positions inside the water cylinder are obtained by this data collection system, and meet the experimental requirements of microwave chemistry. 使用该系统对波导系统中微波加热水的实验进行了数据自动采集,获得了系统电压反射系数和不同位置温度随时间变化的数据,达到了实验要求。