In the recent years, the safety problem in the large stadium has concerned by the researchers. Especially during the period of the large sport, the safety problem of the stadium has become an important public event. This paper designs a multi-function monitoring and alarm system based on the mobile communication network. It could realize the smoke or combustible gas alarm, the infrared identification detection and the temperature alarm. It collects the data through the sensor and sends the data to the mobile phone or the control platform. The system has the characteristics of simple, convenient, safety, various functions and low cost.