This system takes android as the client platform, uses the java programming language, the interface uses the XML language, relates to the database development function module uses the Android platform embedded database SQLite. javaweb to build a bridge with MySql database connection as a server.

By locating the elderly and obtaining the walking track of the elderly and tracking the historical track of the elderly, the user adds friendliness, views the historical track of friends, and sets friends as emergency contacts. If the current location of the elderly is beyond the safe area, the current specific location information of the elderly is sent to the emergency contact.