SCADA系统是具有数据采集、监视、控制功能的计算机系统,经历了集中式监控系统、微型计算机监控系统、分层分散型监控系统的发展。该文介绍了一个分层分散型并带有网络的SCADA系统的结构和特点,给出了一个实例,指出中央级至少有一台调度计算机,一般有主计算机和若干台调度计算机,用网络或总线连接,达到资源共享。中央数据主通信控制器通过通信道与各RTU或PC通信,实现计算机监控功能。又介绍SCADA系统在电力系统、交通监控中的应用。最后指出SCADA系统向着计算机开放式综合网络监控管理系统发展。 SCADA system is a computer system with data acquisition, monitoring and control functions. It has undergone the development of centralized monitoring system, microcomputer monitoring system and hierarchical monitoring system. This paper introduces the structure and characteristics of a decentralized and networked SCADA system. An example is given. It is pointed out that there is at least one scheduling computer in the central level, generally with a host computer and several scheduling computers. The network or bus Connect, to share resources. The central data master communication controller communicates with each RTU or PC through the communication channel to realize the computer monitoring function. Also introduced the SCADA system in power system, traffic monitoring application. Finally, it points out that the SCADA system is developing towards a computer integrated network monitoring and management system.