The entire dust online monitoring system consists of total suspended particulate matter (TSP), PM10 and PM2.5, meteorological parameter meters, sprinkler systems (fog cannons), data acquisition, transmission, storage and processing systems, information monitoring and management platforms, and other auxiliary equipment. Scalability should be retained. Real time, remote, and automatic monitoring of particulate matter concentration has been achieved through online light scattering monitoring devices, meteorological five parameter acquisition equipment, and acquisition transmission devices; The data can be accessed on the platform through 2G/4G network transmission; The monitoring platform also has various statistical, automatic control, and high concentration alarm functions, which are linked with the (spray) fog cannon system to implement atomization spray dust reduction measures for the on-site environment. When the particle value reaches the set lower limit, the spray system will automatically shut down; The achievement of intelligent self-control has effectively promoted the continuous improvement of urban environmental quality, and can be widely applied in real-time monitoring of unorganized emissions in construction sites, bulk cargo yards and docks, concrete mixing plants, and factories and enterprises.