介绍了一种利用GPRS模块MC３５I以及SoC单片机C８０５１F０２３实现的远程监测系统。重点介绍了终端驱动MC３５I接入Internet所必需的PPP／IP／TCP协议栈的实现方法，以及如何在Visual Basic环境下利用Winsock控件与终端进行通信，同时分析了可能使系统稳定性降低的原因并给出了解决方案。 Design of Monitoring System Based on GPRS Wireless Module MC３５I QIN Da-xing１，２，LIU Jian１，ZHENG Xi-feng１ （１．Changchun Institute of Optics，Fine Mechanics and Physics，Chinese Academy of Science，Changchun １３００３３，China；２．Gradute School of Chinese Academy of Science，Beijing １０００３９，China） Abstract：Introduced one long-distance monitoring system which utilized GPRS module MC３５I and SoC MCU C８０５１F０２３．The focus is on how to realize the terminal drive MC３５I connecting to ether Internet with PPP／IP／TCP protocol，and how to use Winsock control and terminal to communicate in Visual Basic environment．Meanwhile，it analyzed the reason that reduced stability of system and how to solve it． Key words：GPRS；MC３５I；TCP／IP／PPP；MCU；winsock