A computer has a selecting section, an acquiring section, a display control section, a setting section and a processing contents data transmitting section. The selecting section selects an image processing device. The acquiring section acquires from the image processing device selected by the selecting section, display data for displaying a setup screen which sets contents of an image processing that the image processing device executes. The display control section, on the basis of the display data acquired by the acquiring section, effects control such that the setup screen is displayed on a display. The setting section sets the contents of the image processing via the setup screen displayed on the display. The processing contents data transmitting section transmits, to the image processing device, processing contents data expressing the contents of the image processing set by the setting section.