Urban dust sources have such characteristics as openness, multiple spatial sources, extensiveness, and random emissions. The online dust monitoring system can trace the source of dust pollution, perform fine quantitative analysis of the dust pollution levels, and remotely monitor and capture evidence of illegal dust pollution. Moreover, it can also provide increasingly scientific-technical and data support for effective control over urban dust pollution. The online dust monitoring terminal launched by CRY Sound is an online monitoring terminal for open pollution sources that integrates technologies such as particulate matter (PM) online monitor, noise monitor, meteorological parameter sensor, data acquisition board, and information platform. It is mainly used for online and real-time automatic monitoring of the ambient air quality in the areas where the discharge of fugitive dust pollution sources occurs, as well as residential, commercial, road traffic, and construction areas, etc.