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For such an environment, such as radiation, pollution, dangerous, distributed environment where the staff is not easy to reach, it is difficult to complete data collection and real-time monitoring through the traditional manual method. The study of remote wireless monitoring system, which based on the MCU (micro control unit programming) and GPRS (General Packet Radio Service) architecture, can well meet the needs of these applications. This paper introduces the overall system architecture, discusses in detail the key technology of the communication between MCU and the Internet. The reliability and real time performance of the system have been proved through practical application in the engineering project.