To provide an image output system, a controller, an image output apparatus, an image output method, a program for making the method perform, and a storage medium with the program stored thereon, which make it possible to create color proof for reproducing a last printed matter more faithfully by considering the printing sequence for each colorplate constituting the printed matter.

The color collection extraction part 14 of the controller 1 collates the specified printing sequence with the printing sequence for each color targeted by a color collection table, which is preset by a printing sequence setting part 12b and stored in a color collection table storage part 13 along with a color collection table, when image data are stored in a storage part 10, and the printing sequence for each colorplate constituting the image data is specified by a printing sequence specification part 11, thereby extracting the color collection table in which each printing sequence is matched.