The use of wheelchairs can be considered in the following cases: i. Those with reduced or lost walking function. Such as amputation, unhealed lower extremity fractures, paraplegia, other neuromuscular system diseases causing bilateral lower extremity paralysis and severe lower extremity joint inflammation. Second, the non-motor system itself disease, but walking is unfavorable to the systemic state. Such as serious heart disease or other diseases caused by systemic failure, etc. Third, the central nervous disorders make independent walking at risk. Such as those with dementia, unilateral spatial disorientation and other intellectual and cognitive impairments of cerebrovascular accidents, those with symptoms similar to the aforementioned after craniocerebral injury, those with severe Parkinson’s disease or cerebral palsy who have difficulty walking, etc. Fourth, elderly people who have difficulty walking and may have accidents.