文章介绍了用AT89S8252单片机的串行接口与智能温度巡回检测仪（XJ-08S）通过RS—485总线相互通讯实现热水温度远程显示的一种低成本解决方案，内容涉及RS—485总线通讯、单片机驱动数码管显示、数据转换以及键盘处理软硬件设计等内容。-This paper introduces the serial interface using AT89S8252 microcontroller and Intelligent Temperature Loggers (XJ-08S) via RS-485 bus to communicate to achieve hot water temperature range shows a low-cost solution, which relates to RS-485 bus communication, Microprocessor digital control, data conversion and processing hardware and software design of the keyboard and so on.