Large-scale landslides, caused by the catastrophic Chichi earthquake, occurred at Ninety-nine Peaks of Wu-Chi Basin. Areas of denudation are estimated to be 908.96ha and urgently need to be restored for preventing further disasters in the rainy season. Satellite images and digital terrain models were used to process the vegetation index for identifying landslide sites and to extract topographic information of the areas. A system coupled with GIS developed in this research could be used to monitor and/or assess the recovery rate of vegetation after landslides.