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。-This paper presents a DS18B20 based on the digital thermometer design. Program uses AT89S52 DS18B20 MCU control data acquisition with a LCD HS1602 said modules display the results addition, the acquisition results from RS-232-C interface into the computer display and storage. Achieving control over key sectors temperature alarm settings and real-time monitoring, the use of AT24C08 chip memory, Temperature measurement storage and retrieval.