Abstract: GPS monitoring system is an advanced vehicle monitor means which combines Car GPS terminal and GIS and other software and hardware technology. The message middleware-based monitoring system framework discussed and designed in this article is a loosely coupled, highly cohesive framework whose core is messaging service, it’s designed aiming at supporting centralized deployed large systems which provide stable and efficient monitoring services for hundreds of thousands of vehicles all around the place. Being tested by practice, the framework is feasible, and is capable of designing and achieving monitoring systems over extra-large vehicles.

Key words: message middleware, GPS monitoring system, framework design, message queue (MQ), low coupling