ambient air quality monitoring system is a high-performance monitoring equipment developed and produced by Shenzhen Wanyi Technology Co., Ltd. based on many years of instrument development experience and combined with sensor technology at home and abroad. The international advanced optical diffuse and astigmatic relative mass concentration measurement method is used to measure PM2.5 and PM10 in the environment. The electrochemical sensor with compensation function is used to measure CO, SO2, NO, and NO2. The temperature and humidity sensor adopts the chip imported from Switzerland. The ambient air quality monitoring system has the characteristics of fast response time and easy maintenance. At the same time, the structure adopts the aerodynamic principle to realize automatic real-time sampling. The built-in thermostat ensures the stability of the gas sensor and is suitable for long-term online use. The 7-inch touch data collector has functions such as data storage, curve drawing, USB flash drive export, etc., for easy analysis.