Building digital twin modeling method

The invention relates to the technical field of digital twinning, and discloses a building digital twinning modeling method, which comprises the following steps: S101, acquiring a video stream of a building scene by using a shooting device carried by an unmanned aerial vehicle and a shooting device mounted at a fixed position, and acquiring to-be-processed image frames from the video stream frame by frame; s102, performing two-dimensional target detection on each entity object included in the image frame, and inputting obtained two-dimensional target detection result data into the three-dimensional model; s103, performing coordinate calibration on the model generated in the step S102, including merging calibration of a preliminary three-dimensional model generated by shooting data of an unmanned aerial vehicle and a model generated by shooting data of a fixed shooting device, and dynamic object coordinate calibration; and S104, performing scene updating on the digital twin model according to the continuously