To improve printing throughput by positively utilizing high image processing capability that an imaging apparatus has and making printing processing progress while attaining load distribution about image processing between the imaging apparatus and a printer.

When the imaging apparatus and an image reproducing device connected through a line share and perform development processing of a plurality of images, the high image processing capability that the imaging apparatus has can positively be utilized by determining which images are developed by which sides in accordance with a ratio of development capability between these devices.