In a host-base printing system, it is intended to execute a continuous page printing of continuous print jobs with a maximum printing speed specific to a printing engine in a printing apparatus, without a loss in the printing speed. There is provided a host computer system in which a data generation unit generates a print job based on a drawing command entered from an application software, and transfers the generated print job for example to a printer, characterized in that a plurality of print jobs generated in succession are spooled in a system spooling unit, and a print control unit combines plural print jobs entered from the system pooling unit and transfers them as a single print job for example to a printer.