本文描述了电力企业信息化的建设思路、信息系统功能以及电力企业信息网络体系结构，详细分析了变电站综合自动化系统中的监控系统和保护系统的功能，并就其中的若干关键技术问题进行了分析和讨论。关键词:电力企业，变电站，信息化Abstract: The construction method and functions of information system of electric powerenterprise is described, The architecture of information network of electric power enterprise is also introduced. The functions of monitor system and protection system in comprehensive automatic system for substation are analyzed in detail. And several significant aspects of information of electric power enterprise is discussed.Keywords:electric power enterprise, substation, information