Braced frames and steel plate shear walls (SPSWs) have both been shown to be useful in the seismic retrofit of buildings. While both these systems have merit, no guidance exists to determine which of the two approaches is preferable in terms of providing maximum displacement ductility and energy dissipation per cycle for a given strength. This paper describes and compares results from numerical evaluation using FEM, in which the nonlinearity of materials and the nonlinear effects of the large displacement was included for tow frames. The results of numerical study was identical to the experimental tests, then a barometric study was achieved by changing the thickness of infill plate then the area of the cross sections of braces, after that the width of the frame was modified. The result shown that using steel infill plate is preferable when the dimension of bay is three times the height, while using braces is more adequate for frames in which the dimension of bay is less than three times the height.