Based on the needs of operational remote sensing monitoring, evaluation and management of the water environment, based on model library construction technology, model selection strategy design and multiple operation mode design, using automated data processing technology and "satellite-ground" data fusion technology, a multi-scale and multi-data-source water environment remote sensing monitoring business application system for remote sensing monitoring of water quality of water bodies. The system integrates 380 model methods, establishes a model library, and develops 31 software modules, with two operating modes: salesman and expert. The system establishes an application framework for service-oriented remote sensing monitoring of the water environment based on SOA. Compared with similar software NASA's "SeaWiFS Data Analysis System (SeaDAS)" in the United States, the system has obvious advantages in monitoring typical inland water bodies in my country. The system provides a practical software platform for environmental protection monitoring business departments to carry out commercial remote sensing monitoring of inland water quality. It breaks through the operational technology of remote sensing atmospheric correction of water environment and water quality monitoring technology based on hyperspectral data and analytical models; it has automatic monitoring capabilities of water environment remote sensing data sources; it realizes service-based water environment remote sensing monitoring. Application, and can manage and release water environment remote sensing data and products; realizes HJ-CCD black water mass (lake flooding) monitoring and water pollution diffusion simulation and its three-dimensional visual expression; It can carry out multi-scale non-point source pollution assessment in large watersheds. It can generate 40 thematic maps with 4 frequencies of day, month, season and year, and form 43 application reports; monitoring indicators include water bloom, cyanobacteria outbreak intensity, chlorophyll a, suspended matter, transparency, water meter temperature, algae density, Total phosphorus, total nitrogen, eutrophication index; as well as cyanobacteria aggregation, cyanobacteria distribution frequency, etc. 2010-2012 In 2001, a total of 252 comprehensive analysis reports on water environment quality were produced based on this system, and a comprehensive remote sensing database of water environment in the Taihu Lake Basin was completed, reaching the domestic advanced level.