Image inpainting is greatly applied in invarous areas. In order to find the algorithm which is easy to implement and can repair the conventional damage of image rapidly. A large number of algorithms are researched in this paper. Finally an image inpainting algorithm based on sample block is selected through the experimental comparison. Still it has improved here. At last an image inpainting system on the improved algorithm has been developed in MATLAB . The system is tested. And it shows that the system has very good effect in repairing the texture image and structural image damage through the experimental results. And the image restoration speed is also faster than the existing system. Especially for removing obstructions caused by the effect of repairing damaged areas. So the system is worth popularizing.