The invention discloses a geological-disaster emergency commanding system based on a GIS. The geological-disaster emergency commanding system comprises a data collecting module, a disaster-situation early warning module, a disaster point numbering module, an attribute database, a GIS database, a data fusion module, a map management module, a positioning navigation module, a disaster point management module, a disaster-situation evaluation module, a disaster-situation grading standard library, an emergency treatment module, an emergency plan library and a real-time communication module. Geological-disaster control departments of all regions can query detailed information of geologic attributes of all disaster points, and therefore comprehensive management of disaster points is achieved; meanwhile, emergency plans when disasters occur can be directly and rapidly displayed, and a direct and rapid solution is provided for pre-disaster early warning, disaster commanding and post-disaster rescuing.