The present disclosure relates to a dental three-dimensional data processing device and a method thereof, and it is possible to determine the occlusion state of teeth by combining and aligning teeth data and image data scanning a face, and to generate a teeth model by analyzing the movement of the teeth or temporomandibular joint, thus diagnosing the teeth state more accurately and precisely and analyzing the occlusion state according to the movements of the teeth and the temporomandibular joint； to accurately analyze a patient's condition based on the movement and the occlusion state, thus establishing treatment measures； and to generate and correct the teeth model suitable for a patient's condition, thus enhancing the treatment effect.
