An image processing apparatus for processing drawing data on the basis of print process information including the drawing data and work process steps that should be processed, comprising: reception means for receiving the print process information of a print job including the drawing data of the print job and the work process steps that should be processed; starting means for starting a print job process on the basis of the drawing data and the print process information of the print job; characterized in that the image processing apparatus further comprises: first judgment means for judging (S4, S5) whether or not the work process steps of said print job that should be processed in the image processing apparatus are changed in accordance with a process status of the drawing data of said print job received by the reception means of the image processing apparatus after the print job process is started by said starting means, wherein the first judgment means compares the schedule information with the process status in the image processing apparatus, and if a process in the image processing apparatus is judged to be delayed, judges that the work process steps that should be processed in the image processing apparatus are changed; second judgment means for judging whether or not there is an external device capable of executing at least one of the work process steps among the work process steps specified by the information received by the reception means if the first judgment means judges that the work process steps that should be processed in the image processing apparatus are changed; and change means for changing the work process steps processed in the image processing apparatus to cause the external device to execute work process steps of said print job that can be executed by the external device when the second judgment means judges that the external device capable of executing the work process steps exists, wherein the reception means receives schedule information indicating a schedule that should be processed in the image processing apparatus. reception means for receiving the print process information of a print job including the drawing data of the print job and the work process steps that should be processed; starting means for starting a print job process on the basis of the drawing data and the print process information of the print job; characterized in that the image processing apparatus further comprises: first judgment means for judging (S4, S5) whether or not the work process steps of said print job that should be processed in the image processing apparatus are changed in accordance with a process status of the drawing data of said print job received by the reception means of the image processing apparatus after the print job process is started by said starting means, wherein the first judgment means compares the schedule information with the process status in the image processing apparatus, and if a process in the image processing apparatus is judged to be delayed, judges that the work process steps that should be processed in the image processing apparatus are changed; second judgment means for judging whether or not there is an external device capable of executing at least one of the work process steps among the work process steps specified by the information received by the reception means if the first judgment means judges that the work process steps that should be processed in the image processing apparatus are changed; and change means for changing the work process steps processed in the image processing apparatus to cause the external device to execute work process steps of said print job that can be executed by the external device when the second judgment means judges that the external device capable of executing the work process steps exists, wherein the reception means receives schedule information indicating a schedule that should be processed in the image processing apparatus. first judgment means for judging (S4, S5) whether or not the work process steps of said print job that should be processed in the image processing apparatus are changed in accordance with a process status of the drawing data of said print job received by the reception means of the image processing apparatus after the print job process is started by said starting means, wherein the first judgment means compares the schedule information with the process status in the image processing apparatus, and if a process in the image processing apparatus is judged to be delayed, judges that the work process steps that should be processed in the image processing apparatus are changed; second judgment means for judging whether or not there is an external device capable of executing at least one of the work process steps among the work process steps specified by the information received by the reception means if the first judgment means judges that the work process steps that should be processed in the image processing apparatus are changed; and change means for changing the work process steps processed in the image processing apparatus to cause the external device to execute work process steps of said print job that can be executed by the external device when the second judgment means judges that the external device capable of executing the work process steps exists, wherein the reception means receives schedule information indicating a schedule that should be processed in the image processing apparatus.