The invention relates to a nuclear power station work order task switching device and method. The device comprises an industrial personal computer, a card reader, a work order scanning gun, an upper computer, a middle computer and a human-computer interaction displayer, wherein the industrial personal computer is connected with the card reader, the work order scanning gun, the upper computer and the human-computer interaction displayer, the upper computer is connected with the middle computer, and the industrial personal computer is connected with an industrial network. The device is small in size and convenient to carry on; by means of the device and method, workers do not need to go back and forth between the entrance and the exit of a nuclear power station working area, work orders can be switched any time any place, working time of the workers can be effectively saved, work efficiency is improved, and the dosage of radiation borne by the workers is reduced.