Abstract: In order to verify the estimated wavefront ability of the phase retrieval wavefront sensor (PRWS) system, a measured spherical mirror of experiment platform with the method of PRWS was set up, whose structure was simple and there was little affection of the platform and even can be ignored, even use the camera of the imaging system to estimate the whole optical system without changing anything. In order to validate the veracity of PRWS, PRWS measurement results were compared with ZYGO interferometer measurement results, experimental results demonstrate that good agreemented is obtained among the errors distribution, PV value and RMS value of ZYGO interferometer, so using PRWS technology can effectively estimate the aberration of spherical mirror.