It is a clinical question that is worth paying attention to fall as to old ethnicity. The incidence that the old ethnicity falls is higher than younger generations, except the injury on the limbs far, may also cause the serious sequela in life in the physiology, psychology and social activity after falling. Arrival melting in the society in the face of advanced age and demanding to set up the policy of old man's living environment without hitch at home, falling and preventing and curing and injuring the engineering of the alarm in development, is with positive significance. When the accident happens, the monitoring system of the camera is started and carried and notifies immediately and monitors than correctly far automatically, in order to reach the medical care in good time.