Abstract: In this paper, the application of several qualitive and quantitive methods of analysis, such as statisitcal analysis and structural geological and seismic geological analyses in the research of fault structure, and its relation to earthquakes are discussed deeply. A series of iso-density maps for fault structre are compiled. So several new hidden faults and their attributes are discovered and discussed, and the relations between faults structures and earthquakes are also dealt with here. Active faults which may probably be fraught with earthquake and their dangerous parts as well as seismic regions that will have direct influence upon Wuhan city are pointed out.