Abstract: For the arrival of China’s aging trend and the problem that the elderly are not of effective guardianship, this paper proposes and implements a combined program of wristband positioning terminal and cloud platform. The program can be an effective guardianship for the elderly and a better solution for the empty nesters which are easily lost and difficultly guardian. The cloud platform uses the structure NGINX+PHP+MySQL, the database server REDIS and the C# language communication middleware.

Key words: mobile location, GPS, cloud platform, database, server management, communications middleware