A print system comprising an information processing apparatus, a printer and a server which are interconnected through a network. When receiving the unprocessed print data from the printer, the server performs, based on the received unprocessed print data, obtaining a transmission source identifying information identifying a transmission source of the unprocessed print data and the information processing apparatus which delivers the unprocessed image data to the printer, applying the image processing, which corresponds to the second identifying information associated with the first identifying information identifying a device same as a device identified by the transmission source identifying information as obtained, to the unprocessed print data, and transmitting processed print data which is the print data to which the image processing has been applied to the printer. When the printer receives the processed print data form the server, the printer performs printing based on the processed print data.