Incorporating with modern technologies of sensor and information processing, STM32F103 is used as a control center in the system. Relative action orders such as control switch window are transmitted to a motor module on the basis of analyzing information from sensors, received by GSM module and user by hu. man-computer interface operating. And dangerous warning information is transmitted to user mobile phone through GSM module to guarantee security and comfortableness of living. Protection and isolation measures are taken in the system. And a standby power supply is added so as to keep the switch window in operation state when the power supply is off. The smart home system has strong anti-interference ability and high reliability. And it can be applied to many areas such as smart home and intelligent agriculture.