Abstract: In view of the present security system can not ctuickly respond to remote warning, a kind of remote monitoring system Based on STM32 and GSM/GPRS technology was developed. I}he system used ShM32F103 as the main control chip, The alarm signal will send to the mailbox or the user mobile phone by email or MMS. the actual application results show that the system is stable,response fastly,high cost performance,it's very convenient when people are not at home and providing security for safety precautions.

Key words: MCU, Infrared sensor, GSM/GPRS