To facilitate recognition of the conditions of many monitor object devices in the case of use of this device in the monitor and control device for a large-scale equipment like a water processing plant or a road.

The layout or the like of this equipment is simulated to display a graphic picture on the center part of a screen 2a of a picture display device where a monitor picture is displayed, and the operation is performed with a cursor on keys K1 to K6 formed in the peripheral edge part of this graphic picture to successively read out past and future forecast data stored in a data base, and numerical values and color in the graphic picture are changed to realize trend display capable of recognition of data transition accompanied with time elapse. Since trend display can be realized with the graphic picture capable of recognition of correlations between monitor object devices, conditions of many monitor object devices are easily recognized to enable an operator to quickly take a measure against a fault or an accident.