Image restoration is a technology with broad development and application prospects. With the progress of modern signal processing technology, control technology, estimation theory, numerical analysis and other methods, new recovery methods will continue to emerge. Digital image recovery technology is a practical and application technology, has a wide range of application space. In addition to the mathematical basis, digital image restoration technology itself does not have a complex theoretical background, its development is mainly driven by other disciplines. Early development mainly depends on digital signal processing, and then with the help of control theory to make it get further development. It is hoped that in the future more scholars in other disciplines will be able to introduce suitable research methods and research ideas in their fields into image restoration technology, and inject new vitality into them and move them to a higher level.