A PODSS acquires from a job ordered from the client PC, limited access information for accessing an APSS. If a user selects the received job from an MFP, and if it is necessary to access the APSS, the PODSS notifies the MFP of the access information. The MFP then uses the notified access information to request the APSS for a corresponding application service. The PODSS receives processed service data and generates print data to be transmitted to the MFP.