本文介绍了一种基于DS18B20的数字温度计设计方案。方案利用AT89S52单片机控制DS18B20进行数据采集并由HS1602液晶显示模块显示结果，另外，采集结果可由RS-232-C接口送入计算机显示并存储。按键控制实现过界报警温度设定和实时监控，利用AT24C08芯片进行存储，实现温度测量存储与再现。- In this page,we introduced a conception of the numerical thermometer based on DS18B20. The conception makes use of AT89S52 control DS18B20 to carry on the data collection,and displays the result use the HS1602 liquid crystal display module. Moreover, the result can be sent into the computer by the interface of RS-232- C to display and store. The key control carries out the temperature setting of over the boundary to alarm,and real-time monitoring. And makes use of the chip of AT24C08 carries on the storage, and carrying out the temperature measurement storage and reappearing.