Airborne laser scanning system (LIDAR) can provide fast and detailed measurements of the terrain. In this study, the potential application of airborne LIDAR will be investigated with practical experiments. One or several sites which suffered form the 921 earthquake, will be selected for LIDAR mapping. The potential of LIDAR for hazard mapping will be studied by comparing the surveying result from different sources. Other potential applications of airborne LIDAR, such as forestry and utility lines, will also be explored.