the present invention provides and apparatus for distinguishing falls from activities of daily living . first , the human movements and muscle activities would be obtained by an electromyography measuring unit and / or an inertia measuring unit to record adls , and falls would be distinguished from adls to trigger the protecting devices in time to prevent or decrease injury . in addition , the apparatus would be preset for different operational conditions to adapt different users by a setting unit to increase accuracy . finally , the moving distance and the direction of the user would be obtained by the electromyography measuring unit and / or the inertia measuring unit to obtain the location thereof in an interior space .