随着社会的发展以及医疗技术的不断进步，当今社会已经进入老龄化社会。老年人摔倒发生率高，后果严重，这已经成为了一个严重的社会问题。通过科学的手段有效地检测和预测老年人摔倒，从而降低其所带来的危害，已成了国内外研究的热点。但是，国内外目前对人体摔倒等运动状态识别的研究成果尚不成熟，有许多关键问题亟需解决。-With the development of the society as well as the medical technology, fall accident of elders is becoming a serious problem in the social community. While the world aging process quickened, it has become a significant financial burden to the modern society. Hence,reliable fall prediction and detection method is essential to reduce fall related injury in independent living facilities, and it has become a hot investigation world wide.But,the motion state recognition on human body is not mature yet at home and aboard, there are many key issues should be solved.