In order to measure curvature radius of laser wavefront accurately,one method based on Talbot-Moire fringe technique was proposed. The theoretical model of measuring wavefront curvature radius was established. The relationship between wavefront curvature radius and angle of Moire fringe,and the measurement uncertainty of the system were analyzed. The measurement system was designed and constructed. Wavefront curvature radius of laser system with the diameter of 200 mm was measured. The results show that,the...