A print control device manages a print job and a printer based on an instruction from a client terminal. The print control device accepts a print instruction to the printer from the client terminal and authentication information about the client terminal, confirms the validity of the authentication information to an authentication unit configured to issue and manage the authentication information, registers the print job as an execution job together with the authentication information if the authentication information is valid, and accesses the authentication unit during registration of the execution job to thereby update the expiration date/time of the registered authentication information.