A hybrid encryption in the optical transform domain based on public key distribution system is proposed aiming at safely deliver and management of optical encrypted system.Frist,the original image is encrypted based on optical system,and then,the work key of optical system is compressed,finally,distribution and management of the compressed key is dong by public key distribution system.In the decryption stages,the receiver do not need to wait and can obtain dencryption key in advance by means of public key distribution system.The theoretical analysis and computer simulation results show that the proposed method can solve the problem of safely deliver and management and make good use of multi-dimensional keys that encrypted system of optical transform possess.Also,this method highlight advantage of hybrid system speed.