A three-dimensional data processing and recognizing method including scanning and re-constructing an object to be detected so as to obtain three-dimensional data for recognition of the object to be detected; and extracting data matching to features from the three-dimensional data, so that the extracted data constitutes an interested target in order to display and recognize the object to be detected. A quick method to recognize an object to be detected, such as the shapes of cuboid, cylinder, and cutting tool, and so on.