A PC registers in advance PC-assistant copying functions which can be provided by the printer driver for a MFP. The MFP presents, to the user, copying functions including the registered functions. Upon reception of a copy instruction, the MFP determines whether selected functions include a PC-assisted copying function. If the selected functions include a PC-assisted copying function, the MFP transmits, to the PC, scanned image data and a job ticket containing information representing the selected functions. Upon reception of the job ticket, the PC generates a print job for printing the image data on the basis of the job ticket, and transmits the print job to the MFP.