In this paper, a color image encrypting method based on chaos theory is introduced. Image encryption because of some intrinsic features of images, such as high data volume and high correlation among pixels, the encrypting text is different. For this reason the classic method of encrypting text for this purpose is not high performance. For two reasons, the proposed method compared with other methods with high security. First, use the hyper chaos and the second large of the space key. In the simulation results, various experiments have been conducted to analyze the security of the proposed method.