The theory and method of duststorm monitoring by using NOAA, FY-1C, GMS-5 and FY-2B satellite, the calculation of the DDI, and the application of GIS technology are discussed. Multi-channel information of meteorological satellite was used in monitoring the severe sandstorm event occurred on 18-21 March 2002. The origin area, track of transportation and the affected area of the sandstorm are investigated.