;There are a lot of multi-agent system development platforms, such as Jason, Jadex and the foundation of intelligent and physical agent (FIPA)-compatible, stable JADE. In this thesis, we add a belief-desire-intention (BDI) model on top of JADE to make agent able to think. As JADE lacks of environmental description, we used web ontology Language (OWL) to model the environment, thus providing agent communication with environment, in a simple and convenient way. This makes JADE platform more complete. We developed an exemplary elder care system to demonstrate our model, in which TI sensor tag is used to sense the environment.