This paper establishes ACE system that supports active emergency call service. ACE system is physically composed of E-Device (Emergency Mobile Device) for the handicapped, single elderly, and children, and E-Server (Emergency Server) with real-time monitoring management feature. E-Device reports emergency situation to emergency institutions and the user’s guardian through internet or CDMA. Therefore, E-Device is devised to be affordable, light-weighted, and small enough for the minorities including the handicapped, the elders, and children could carry around. E-Server is developed as a comprehensive control system which provides realtime monitoring feature in order to manage E-Devices efficiently and guarantee quality service.