Information checking system and method

The system includes authentication information (AI) server, business server, and client end. AI server creates additional authentication information needed by client end. Client end possesses unique label. Business server provides specific business services for client end. The method for authenticating information includes following steps: client end and server obtain AI or derivative AI generatedby the AI from AI server respectively as well as store then respectively; when client end sends request to business server for carrying out ID authentication, business server compares the stored information with the information sent from the client end. When large numbers of service requests occur, the disclosed system can reduce interactive procedure for authenticating information so as to reduce quantity of operation and network resources tied up by the interactive procedure of authentication.