The invention discloses an electric power facility address selection method taking influences of rainstorm and flood risks into account. The method includes the steps that 1, basic information, aboutdefense against flood disasters, of an electric power facility is sorted; 2, factor analysis of the influence of the flood risk on the electric power facility is carried out, wherein a hydrologic andhydrodynamic model is utilized to conduct laminated simulation of flood inundation in the forward direction, disaster trigger factors having influences on the security of the electric power facility under meteorological rainfall conditions different in intensity are quantized, and then reverse disaster analysis is carried out to figure out a dynamic functioning process of the disaster trigger factors under different water inflow conditions triggered by different rainfall conditions; 3, selection of an optimal address for the electric power facility under the influences of the rainstorm and flood risks is achieved. By carrying out reverse laminated deduction on the disaster trigger factors from an actual disaster scene, the dynamic influences of the disaster trigger factors of rainstorm andflood on the electric power facility during a flood disaster are analyzed, the electric power facility address selection method is optimized in order to achieve effective risk control over other similarly important electric power facilities, and a decision support is offered to disaster prevention and reduction of the electric power facilities.