Due to ionic liquids special features, zero steam pressure, low melting point, thermal stability, and many others, it can, as a potential efficiency, green optical materials or medium, draw more and more attention of the countries' scientists. In this paper, it introduces the ionic liquid, as in recent years show materials, optical transmission optical materials, optical energy storage material, photoelectric material, solar battery materials, and other aspects of the research progress in a relatively comprehensive paper, analyzes and discusses the application of ionic liquid, as optical materials of the problems existing in the field, puts forward the ionic liquids in optical of research in the field of thinking and predicts their future prospect.