The Smart Relief Alert app uses the LoRa private network installed in Yangsan-si, Busan Metropolitan City, Gimhae-si, and Ulju-gun of each local government to provide a portable LoRa provided in the event of an emergency such as disappearance or accident of the socially underprivileged such as children, the elderly with dementia, and the physically handicapped. Receives the alarm signal of the tag and provides emergency notification to the guardian through the app. It is a service that can check the location information in real time using the GPS signal of the tag and respond quickly to emergency situations.- Target: Service applicants in Yangsan- Relief alert for going to and from school: Sending information about going to and from school-Smart location management service: location management, safe/dangerous area notification- Roaming service between local governments: roaming service is supported in 4 local governments (Yangsan-si, Busan-si, Gimhae-si, and Ulju-gun) according to the movement of the user to other local governments