With the development of Internet/intranet technology, the research and development based on Web technology has become a hot topic. My thesis focuses on the study of application of Web technology in integrated automation system. This paper firstly introduces the concept and composition of integrated automation system architecture, and then in-depth analyzes the Web technology and its function and the application to monitoring the Web technology is discussed in detail, and proves the feasibility of application of Web technology in integrated automation system for monitoring through the practice. Finally, the influence of development of Web monitoring system technology is predicted.