介绍了一种基于AT89S52单片机的太阳能环境参数测试仪，详细阐明了环境参数测试仪的软硬件设计与实现方法。该测试仪能对温度、湿度和照度进行实时测量显示，并通过RS485工业总线将采集数据传送至远端上位机。-AT89S52 microcontroller is introduced based on environmental parameters of solar energy tester, detailing the environmental parameter test design and implementation of software and hardware. The tester can be temperature, humidity and illumination in real-time measurements show, and through RS485 industrial bus will collect data transmission to the remote PC.