Abstract: With the development of calibration techniques for large display,investigation on geometry calibration becomes a hot topic.Based on the analysis of the key techniques in geometry calibration for multi-projector display wall,this paper introduces a robust calibration pattern,and presents an accurate geometry calibration algorithm for plane screen by means of the pattern information captured by a digital camera.Then on the basis of the above algorithms,via stereo vision idea,a novel calibration method for stereo plane screen is presented.