In view of the disadvantages of the geography diagram drawing software of PSD-BPA,a design method of power system geography diagram drawing software based on Qt library is proposed.First of all,the software is designed to consist of a three-layer architecture(the data service layer,drawing operation layer and auxiliary function layer)in accordance with the functional demands on the software,as well as the design ideas that the modules are independent of each other and the view is separated from data.And then the main drawing framework is designed based on the graphics view framework of Qt.The implementation of the framework of the database view,the function of flow animation,and the wiring diagram output technology are presented.