Abstract: this paper describes the process on using the methods combined spectral threshold algorithm,supervised classification,unsupervised classification and the manual interpretation based on Landsat TM to derive landuse and landcover information.The results show that the scheme of multi-stage classification combined different information extracting techniques work well for most cover-types.The accuracies for identifying forest land and water area are more than 85%.But it's difficulty to derive some cover-types correctly,such as small resident area and small road in the mountains.