A display control device includes a setting unit to set a mode selected by a user from a plurality of modes, and a display unit to display a machine operation panel and a keyboard on an operation screen of a machine operation panel. The modes include at least a machining mode for operating the machine tool to process a workpiece, and an MDI mode. When the mode is changed, the display unit displays a machine operation panel or a keyboard associated with the mode after the change on the operation screen.