The present invention relates to the technical field of image processing, and in particular, to an image processing method and device. The method comprises: receiving image data of a user sent by an endoscope, and storing and stitching the image data to obtain stitched image data; determining a block corresponding to the stitched image data according to a stored three-dimensional image frame database, determining the position of the block in a stored three-dimensional image contour of the user, and reconstructing the stitched image data on the corresponding determined position in the three-dimensional image contour of the user to obtain reconstructed three-dimensional image data; updating a currently-stored three-dimensional image model of the user; and displaying the updated three-dimensional image model of the user. In this way, on the basis of the three-dimensional image frame database and the three-dimensional image contour, a three-dimensional image of an oral cavity can be reconstructed without continuously and orderly scanning the oral cavity, and can be dynamic displayed. Therefore, the user interaction effect is improved, and self-service three-dimensional true-color impression taking of a user is well supported.