The application services of ubiquitous network are considered to be an important subject. In recent years, numerous studies have been attempted to develop ubiquitous medical appliances. In this paper we studied about the development of Wireless Sensor Network system for the outdoor living security of the people with disability. The novel system of this paper can recognize the outdoor living context of people with disability and support the safety of outdoor activity of them. Three-Axes accelerometer are adopted for falling down context awareness. And this system present a fallen disabled and the follow-up measures.