This research takes the Xiangride oasis as a study area, and takes temporal Landsat TM images in 1987 and 1999 as data sources. Based on a great many data obtained in field spots, temporally different images in the two terms were processed accurately through the application of 3S techniques (RS, GPS and GIS). The dynamic change in land cover was analyzed, and the temporal-spatial change characteristics and the driving forces were summarized. A new research method and some suggestions were presented for the sustainable development and environmental improvement of the oasis.