The facial structure information of a person includes a high degree of uniqueness. Data obtained from 3D measurements and reconstruction of the face is useful in facial recognition and medical plastic surgery. In this study, structured light projection technology is used to project a specially coded near-infrared grating stripe onto the face to facilitate the calculation of a 3D appearance of the face. Simultaneously, the facial feature points are detected using 2D texture images, and the distribution of key facial feature points is obtained. Finally, accurate acquisition and understanding of key facial feature information is achieved by combining 2D distributed feature points and 3D point cloud information. This provides reference for future applications of 3D facial detection, such as medical treatment, facial recognition detection, and virtual human data input.