A system including an authentication unit and an authentication-based print-job generation unit including: a job acquisition module that acquires a print-job in a first format processable by a first printing device and a print-job in a second format processable by a second printing device; a module that acquires printing person identification information; and a module that generates an authentication-based print-job by adding the acquired printing person identification information to the acquired print-job, and outputs it to the authentication unit. The authentication unit includes: a module that acquires the authentication-based print-job; a module that extracts the printing person identification information and the print-job, and stores them in a storage module; a module that executes authentication for a user who requests printing execution; a module that selects from the storage module a print-job associated with the printing person identification information for the authenticated user; and a module that outputs the selected print-job.