The portable atmospheric environment monitor is mainly a hand-held mobile terminal equipped for environmental law enforcement personnel. The instrument can monitor six parameters of AQI (SO2, NO2, PM10, PM2.5, O3, CO), volatile organic compounds, temperature, humidity, air pressure and more than ten atmospheric environmental indicators. It can be used for real-time monitoring and data recording at any time specially for environmental law enforcement. Its main purpose is to strengthen the on-site law enforcement of environmental protection departments and improve the efficiency of law enforcement.