Abstract: To quantitativly evaluate of image restoration of optical sparse aperture systems,a image restoration method that uses single point image as the degradation image is presented.When this degradation image is processed by appropriate restoration algorithm (with proper parameters),a distribution similar to Airy pattern is obtained.By calculating the correlation coefficient of the restored image and equivalent filled system's Airy pattern,the restoration algorithm can be evaluated.As an example,image restoration and evaluation of SOLARNET (France optical sparse aperture system) are achieved to demonstrate this method.Results show that complicated image can be restored as the same resolution and image quality as an equivalent filled system's,by using the same restoration algorithm of the single point image.