A remote optical information authentication system based on visual cryptography is proposed in this paper. The system can pair distant visual key with visual key in the system by telescope system to achieve incoherent superposition for authentication operation, which not only reduces the manual transfer process of the shared keys, but also solves the problem of inconvenient transport of the keys in practical applications. Moreover, the field of view is limited by the system during the entire extraction process, only the operator can see the authentication information in the system, and others cannot view it even if they are nearby, which strengthens the security of the information display and reproduction. The authentication process only requires the operator to align the two shared keys carefully, without mastering other optical and cryptographic knowledge, and the whole process is simple and efficient. In addition, optical experiments also prove that the system can be used in practice and has high security.