To support reduction in work volume required for adjustment on conveyance of sheets of paper using an adjustment value on the conveyance of sheets of paper corresponding to types, etc. of the sheets of paper that has been executed, differently from a case where an adjustment value on the conveyance of sheets of paper corresponding to types. etc. of sheets of paper is not stored.SOLUTION: An image forming device receives sheets-of-paper information on types of sheets of paper for forming an image (S10), acquires assist information, which is the information corresponding to the sheet-of-paper information and concerning the conveyance of sheets of paper, on supply assist for sheets of paper, which is executed by supplying a gas to the sheets of paper (S20), and adjustment information on position adjustment for the sheets of paper after the supply assist of the sheets of paper (S30), and executes control to associate the sheets-of-paper information, the assist information, and the adjustment information, and stores them in a storage part (S50).SELECTED DRAWING: Figure 6