Abstract: To realize the safe and efficient RGB image encryption scheme, a quantum image scrambling scheme based on Rubik's cube rotation method was proposed, and the corresponding quantum circuits were given. Combined with quantum exclusive OR (XOR) operation and quantum swap operation, a quantum RGB image encryption scheme was designed. The whole quantum circuits of above encryption scheme were given and the simulations were also realized. Results show that the quantum RGB image encryption scheme has good encryption effect. The computational complexity of the encryption scheme proposed has exponential acceleration compared with its classical counterpart.