Three-dimensional scene construction and real environment matching method and system for graphic design drawing

The invention discloses a three-dimensional scene construction and real environment matching method and system for a graphic design drawing, and the method comprises the steps: firstly carrying out the preprocessing of the graphic design drawing, obtaining the information of a minimum bounding rectangular frame of each entity object, searching a corresponding model in a three-dimensional editor, importing the model into a scene, and obtaining the minimum bounding rectangular frame information of each entity object; setting the position, zooming and rotation attribute information of the model, and completing the construction of a three-dimensional scene; scanning equipment in a real environment, and establishing a proportional relation between the three-dimensional scene and the real environment through a proportional relation between the length, width and height of the equipment and the length, width and height of the corresponding model; finally, coordinate transformation is carried out, and matching of the