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Land use of Shanghai City has changed very fast in the rapid procession of Urbanization since 2003, In order to find out the changes of the land use/cover information, Taken LANDSAT 7 ETM+ remote sensing images and topographic maps as data resource, based on the four kinds of information index were extracted by the ETM+ images In ENVI4.2 and ERDAS IMAGINE8.7, LUCC information from 1999 to 2005 of shanghai city were extracted accurately by decision tree classification method. The result show that urban area of Shanghai city rapidly expanded, especially the building land accounted for more than 60% in 2005, and the area of other kinds of land use and cover reduced remarkably.