To shorten a printing time by printing print jobs in order of their printing time including a post processing after printing, starting from the shortest one.

A receiving section 11 receives print jobs including print data to print on a print medium such as paper, and post processing instruction information for the print medium after printing. An analyzing section 19 analyzes the contents of the post processing instruction from the post processing instruction information. A printing managing section 21 calculates a printing time including the post processing, based on the analyzed post processing instruction data, thereby determining printing order, starting from the print job having the shortest printing time.