FY-3 is the second generation of Chinese poplar orbiting meteorological satellite with the capability of multi-spectral, three-dimensional and quantitatively global observation. As one of the most important space observation component of World Meteorological Organization, FY-3 satellites are playing key role in weather forecast, climate analysis, environmental management, disaster monitoring etc. The FY-3 ground segment has the capacity of global data acquisition in short latency. After data pre-processing and product generation, FY-3 data and products provide comprehensive service in the field of atmospheric sounding, ozone and radiation budget monitoring, data assimilation, climate application.