A hardware processor includes: a communication part connected to the hardware processor; a rasterization processing time predictor that predicts a rasterization processing time required for rasterization processing; an output setting information extractor that extracts output setting information from print information about each page and transmits the output setting information to the hardware processor; a warm-up start time calculator that calculates a warm-up start time at which the hardware processor starts warm-up processing in accordance with productivity information about the hardware processor; a warm-up start notifier that notifies the hardware processor of a start of the warm-up processing, when a current time reaches the warm-up start time; a rasterization processor that transmits image data to the hardware processor, the image data being generated by performing the rasterization processing for each page; and a print start notifier that notifies the hardware processor of a print start after the warm-up processing is completed.