A print data forming apparatus has an authentication information setting unit which sets authentication information into a print job. A print processing apparatus has: a print job storing unit which receives and stores the print job in which the authentication information has been set; an operation panel control unit which receives the authentication information based on a print request; an authentication discriminating unit which compares the authentication information based on the print request received through the operation panel control unit with the authentication information of the stored print job, thereby discriminating whether or not they coincide; and a print job managing unit which, if they coincide, allows all print jobs having the authentication information that coincides with the authentication information based on the print request among the stored print jobs to be print-processed. A print system which can perform the authentication printing with high workability is obtained.