The air quality monitoring system is a new environmental monitoring system produced by our company. The system can simultaneously monitor a variety of environmental parameters, can monitor dust, gas, etc., has the characteristics of small structure, convenient installation, long service life and maintenance-free. Data aggregation and remote transmission based on low-power wireless sensor network technology. The system analyzes the dust in the environment through a laser scattering unit, and monitors the concentration of SO2 and nitrogen oxide gas by using a gas monitor.