Remote sensing monitoring can perceive the pollution range, pollution degree and the way of pollution diffusion and dilution, which is superior to any other monitoring means and methods. Repeated continuous monitoring in the same area can grasp the dynamic data of pollution changes with time, conditions, weather and sunshine; Not limited by geographical and topographical conditions, working around the clock; Compared with manual analysis and determination, it has the characteristics of fast monitoring speed and labor saving.

Remote sensing mainly monitors air pollution and water pollution in environmental monitoring. Remote sensing monitoring of atmospheric pollutants can provide pollutant concentration data, emission plume and pollutant diffusion distribution of atmospheric pollution sources, and monitor pollutant components such as nitrogen oxides, O3, CO2 and SO2. Remote sensing water pollution mainly includes eutrophication, suspended sediment, solid floating objects, various wastewater, offshore oil pollution, red tide and some hidden pollution sources.