本文介绍以单片机AT89S52为核心的温度显示报警系统。本系统采用DS18B20采集现场温度，用LED数码管显示温度值，并可根据需要设置控制温度的上限，系统具有超过设置上限自动报警的功能。-This article introduces the AT89S52 microcontroller core temperature display alarm system. The system uses DS18B20 collection site temperature, with LED digital display temperature, and temperature control needed to set the upper limit, the system has more than set the upper limit alarm function.