With the accelerated urbanization process, ground collapse problem become one of the major geological disasters in Nanjing City. The authors divide the ground collapse of Nanjing City into three major types such as karst collapse, goaf collapse, and project collapse. The ground collapse is mainly due to excessively pumping groundwater, mining or heavy rains, artificial loading, artificial vibration. Only if Nanjing government strictly limits to develop of groundwater and mineral resources, and ascertain the condition of the geological environment. It can effectively control ground collapse.