Abstract: Non-road mobile machinery has a huge quantity and emissions, consuming a large amount of fossil fuels such as diesel, and pollution situation is very severe．Based on actual needs of non-road mobile machinery pollution emission control, key technical route of "Beidou+big data analysis+visualization application" was applied to design and apply a remote monitoring system for non-road mobile machinery pollution emissions, aiming to fundamentally solve problem of how to transform non-road mobile machinery pollution prevention and control from civil defense to technical defense．