Because of the remarkable progress in public health and medical technology, the life expectancy of our society has obviously increased. With the concomittant decrements in reproductivity, our society has the tendency to be aging. It is crucial to pay attention to the increasing needs of geriatric care. Aging process, sedentary life style and disease itself will complicate the whole condition in elderly, which result in the picture of multiplicity, consequentialness, dependency, slow recovery and functional disabilities. This article is going to discuss the general principles, special considerations and the guidelines of P.T. in common geriatric diseases. Meanwhile, it also heralds the increasing need of physical therapists who playing preventive, curative and maintaining roles in acute, chronic care facilities, or even the home care agencies.