White-light speckle method, together with stereo-photographic method, was used in this paper to measure the 3- D displacements of mark points on the surface of the human articular specimens during spacial movement. As the articulars undergo finite displacement and rotation, index of plane tilt and plane rotation were introduced to describe the general movement instead of the common rotations about the three orthogonal axes. Primary experiments had proved the viability of the presented method, which will be helpful in evaluating the medical operations.