Analysis of the seismic assessment for the building result that relates to plastic hinge property for every member. But the plastic hinge property with studied the theory in the past, no studies have compared to existing building test data. So since the 94th year of the Republic of China, the National Center for Research on Earthguake Engineering carry out a series of static push over tests for existing building, in order to get result of the correspond to earthquake damage of reality. This text use of various kinds of theories, calculate the intensity and plastic hinge property of the beam, colum and brick wall. And used to analysis of nolinear static push over in SAP2000 to simulation of the behavior and way of destroying in earthquake of the building. Then compare with results of the push over test for existing building in order to look for a good simulation method.