Control device

The invention provides a control device, and aims at solving two conflicting tasks of compacting (reducing display space) of a frame and improving visibility. The control device displays the control with a controlled object and monitors the relevant information. The control device comprises: a display part which can display a first numerical value and a second numerical value, and a control part which can control the display of the display part, wherein the first numerical value shows a first information related to the controlling or monitoring with the controlled object, and the second numerical value shows a second information related to the controlling or monitoring with the controlled object. The control part keeps different display modes between the first and second numerical values and switches a first display state and a second display state according the time, in the first display state, the display size of the first numerical value is greater than the same of the second numerical value, in the second