介绍了一种中型水电厂无人值班计算机监控系统的设计思想、系统结构、系统功能及抗干扰和可靠性措施 .根据水电站的特点 ,采用全分布冗余结构对水电厂的电气量进行采集和控制 ,实现遥信、遥测、遥控和遥调功能 ;在系统设计中考虑了故障自动诊断和自动处理 ,同时还考虑了现场的抗干扰问题 ,工程实现取得了较好的效果 This paper introduces a design idea, system structure, system function and anti-interference and reliability measures of unmanned computer monitoring system in medium-sized hydropower plant.According to the characteristics of hydropower station, Control, to achieve remote signaling, telemetry, remote control and remote control functions; in the system design to consider the automatic fault diagnosis and automatic processing, but also considered the field of anti-jamming problems, the project achieved good results