Computer technology has been widely applied in the field of security. The powerful computing power the microcontroller out of abundance and diversity of data processing, providing users with a friendly and intelligent service at the same time. With the development of multimedia technology and network technology, the applications of security requirements also reached a new stage. Considering the security itself the characteristics of high reliability and high availability, we need to do more complete design of safety monitoring system. This paper designed a system framework, it through data collection, analysis, processing, rules, criterion, violations, stop, and record all the process, to realize the protection and monitoring of all kinds of information in local or remote computer, and then it discusses the module and different function in the system.