The present invention relates to a method for verifying a measurement control system of a nuclear power plant, and a verification device therefor. A method for verifying a measurement control system used in a nuclear power plant according to the present invention comprises the steps of: connecting a measurement control system to be verified and a simulator that simulates a nuclear power plant; loading a control logic for a first system to the measurement control system to be verified; and verifying the measurement control system to be verified while the first system is operating in the measurement control system to be verified and a second system is operating in the simulator.
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