A three-dimensional imaging method and system. The method comprising the following steps: acquiring, by means of an orthogonal scan probe, at least two orthogonal two-dimensional images of a scanning target (S1)； moving the orthogonal scan probe along a specific spatial direction, and acquiring at least two orthogonal two-dimensional images of the scanning target (S2)； comparing the two-dimensional images of a corresponding direction obtained from step S1 and step S2, and obtaining movement information of the orthogonal scan probe along the direction (S3)； repeating steps S1 to S3 until the scanning target is completely scanned (S4)； and reconstructing, by means of the acquired two-dimensional image and three-dimensional motion information of the probe, a three-dimensional image of the scanning target (S5). The system comprises at least two scan probes (201) for acquiring orthogonal images, a computing unit (202) for analyzing continuous motion information of a two-dimensional imaging probe, and a three-dimensional imaging device for acquiring a three-dimensional image. The method and system simplify a structural assembly of an imaging system and further improves upon an economic feasibility.
