本文作者采用AT89C2051单片机和温度传感器DS18B20从硬件和软件两方面介绍了一款简易数字温度计的设计过程，  并对硬件原理图和程序流程图作了简洁的描述。数字温度计与传统的温度计相比，具有读数方便，测温范围广，测温准确，其输出温度采用数字显示，主要用于对测温比较准确的场所。-The author of this article using AT89C2051 MCU and temperature sensor DS18B20 from both hardware and software, introduced a simple digital thermometer of the design process, and schematic diagram of hardware and procedures were concise descr iption of flow chart. Digital thermometer with a traditional thermometer, compared with a reading of convenience, a wide range of temperature measurement, temperature measurement accuracy, the output of the temperature digital display, mainly used for more accurate temperature measurement sites.