An imaging method. The method comprises the following steps: determining a target by identifying target-related position information or characteristic information (S101); implementing a two-dimensional scan of the target to collect image data of the target in a three-dimensional space (S102); processing, during the scanning, and on a real-time basis, the image data and relevant spatial information to obtain a plurality of image contents of the target, and displaying the image content on a real-time basis (S103); and arranging the plurality of image contents in an incremental sequence to form an image of the target (S104). The imaging method prevents collection of unusable image information, shortens image data collection time, and increases the speed of an imaging process. The application further provides an imaging device.