With the gradual advancement of Hainan's construction of an international free trade port, the ecological environment quality of Hainan Island has been paid more and more attention by the majority of islanders. The dust pollution and noise pollution

caused by construction, air pollution caused by production and life, and water environment pollution caused by wastewater discharge

have brought great challenges to the ecological environment of Hainan. The ecological environment monitoring system adopts integrated sensor monitoring, which has the functions of monitoring temperature, humidity, PM2.5, noise, wind direction and wind

speed at the same time, setting the upper limit of PM2.5 content by pressing the key and linkage audible and visual alarm.

STC89C52 single chip microcomputer is used as the central processing module, C language is used as the development language,

Keil software is used to write and debug the program.