For the most part, recent study of data fusion have tended to center around the electric power
problem. But the leading motive of the wireless sensor networking is context awareness. And the context should get situation, conditions, circumstances, state of affairs. Therefore data fusion should process for the context awareness. My approach in this paper is based on the theory of Dempster-Shafer for multi-sensor data fusion. We can get advanced context through novel multi-sensor data fusion and adopt it for the safety of children with disabilities in their school.