Method and system for constructing three-dimensional model based on digital twinning

The embodiment of the invention provides a construction method and system of a three-dimensional model based on digital twinning, and belongs to the technical field of construction of digital twinning models. The construction method comprises the following steps: acquiring point cloud data of a transformer substation acquired on site; performing rough modeling on the transformer substation according to the point cloud data to obtain a rough three-dimensional model; determining scene information and equipment information according to the coarse three-dimensional model; acquiring a scene model from a preset scene library according to the scene information; acquiring an equipment model from a preset equipment library according to the equipment information; and combining the scene model and the equipment model to obtain a digital twin model. According to the technical scheme, the construction method and system of the three-dimensional model based on the digital twinning have the advantages that the scene and the