Modularized design method and system for nuclear power station

The invention discloses a modularized three-dimensional design method for a nuclear power station. The three-dimensional design method comprises the following steps: determining a modularized three-dimensional design area by a modularized three-dimensional design system according to a module range selection rule; identifying an item to be designed in the modularized three-dimensional design area; according to the operation working condition and the design requirement of the item to be designed, establishing a modularized three-dimensional model; and according to the established modularized three-dimensional model and item identification, executing a modularized three-dimensional design operation. In a nuclear power station design process, 3D-based modularized design for the nuclear power station can be realized. In addition, the invention also discloses a modularized three-dimensional design system for the nuclear power station.