Encryption system and method based on quantum random number

The invention relates to an encryption system and method based on quantum random numbers. The encryption system at least comprises at least two clients, a server and a quantum random number generator. The client can be used as a sender or a receiver of information to be transmitted. The server can receive the public key which is sent by the client and corresponds to the client, and sends the public key of the client serving as a receiver of the information to be transmitted to the client serving as a sender of the information to be transmitted. The quantum random number generator can send a quantum random key corresponding to the to-be-transmitted information to the server. And the client serving as a sender of the to-be-transmitted information encrypts the to-be-transmitted information by using the quantum random key, and sends to-be-transmitted data including the to-be-transmitted information to the client serving as a receiver of the to-be-transmitted information. And a client serving as a receiver of the