Military boxing, a kind of Chinese martial arts, is widespread and health beneficial. In this paper, the authors introduce a military boxing learning system realized by 3D motion capture, Web3D and 3D interactive technologies. The interactions with the system are natural and intuitive. Users can observe and learn the details of each action of the military boxing under different views and scales by translating, rotating and zooming the 3D human body models. Smartphones also can be used as the input/output device in the system, which provides natural interactive operations by voice and sensor technologies. The evaluation test has shown that the learning effect of the system is better than via traditional video. The system can be extended to Tai-Chi, gymnastic exercises and other routines.