PROBLEM TO BE SOLVED: To provide a central controller of a nuclear power plant capable of reducing burdens on an operator and improving safety and reliability of the nuclear power plant.SOLUTION: This central controller 40 of a nuclear power plant monitors and controls the nuclear power plant. Also, the central controller 40 includes: devices for a monitoring operation (alarm VDU 411, regular system VDU 412 and safety system VDU 413 of operation console 41) having both of a function as a display part for displaying information (for instance, operation information and safety information) of the nuclear power plant and a function as an operation part for operating the nuclear power plant; and a control part 43 for controlling the devices for the monitoring operation. Also, the control part 43 selects an operation process document corresponding to an input operation to the device for the monitoring operation and makes it displayed at the device for the monitoring operation.
