The invention discloses a spherical-pose-datum-based grating type automotive morphology detection system. With the system, automotive morphology scanning can be realized by using a spherical-pose-datum-based grating way. The automotive morphology detection system is mainly composed of a spherical box body (1), a projector (2), an inner target camera (3), a tripod (4), an outer target camera (5), and a triangular target (6). The provided spherical-pose-datum-based grating type automotive morphology detection system has advantages of small occupied space, simple structure, high inspection accuracy, simple operation, easiness in installation, low cost, and high reliability.