The environmental air automatic monitoring system consists of SO2, NO2, O3, CO, H2S, HF, air particulate matter (TSP, PM10, PM2.5), meteorological analyzer, on-site calibration system and other instruments, as well as data acquisition system, sample gas acquisition system, remote data communication system, etc. It can also integrate real-time video monitoring, smoke alarm, water immersion alarm, power supply alarm, station temperature and humidity alarm and other integrated intelligent station monitoring systems. A meteorological analyzer can measure wind speed, wind direction, temperature, relative humidity, atmospheric pressure, rainfall, and rainfall intensity. The on-site calibration system includes multiple standard gases and a set of gas calibration devices. The data acquisition system includes substation computers and data acquisition software. The system can automatically perform continuous collection of monitoring instruments, meteorological instruments, calibration data, and equipment status information, and perform information preprocessing and storage to wait for central computer polling or data upload operation instructions. The sample gas collection system consists of a sampling head, sampling tube, branch joint, extraction fan, exhaust port, etc., to collect sample gas from the atmosphere for real-time data analysis. The remote data communication system consists of fiber optic lines and modems for wired modulation transmission or direct use of wireless PC cards (supporting GPRS) for wireless transmission, to ensure real-time communication of station data information, remote assistance, etc.