Abstract: In this paper, the authors introduce self-monitoring technology for measuring and controlling network. On the analysis of the difficulties of the surveillance technology, Gas Analyzer Wireless Monitoring System BO2000 is taken as an example to expound the wide-area monitoring technology with the implementation of controlled network. By using the self-monitoring technology, users can not only see the data of monitored equipment, but also the state of measuring and controlling network itself, so the reliability, credibility and control security of measuring and controlling system are improved.