This paper presents an agent based system to increase the life time of node in Wireless Sensor Networks. In environment where node density is massive, placement is heterogeneous and lot of sensory traffic with redundancy is produced; individual nodes waste limited wireless bandwidth and consume lot of energy. This minimizes their life time on the network. Directed diffusion paradigm for distributed sensing of the environment has stated to deal with the phenomenon. Directed diffusion approach is data centric in that all communication is for named data. All the nodes in the directed diffusion are application aware and achieve energy saving by choosing good paths and processing data in-network. We unmitigated our efforts to augment the node life time in sensor network by introducing mobile agents. Mobile agents can be used to greatly reduce the communication cost, especially over low bandwidth links, by moving the processing function to the data rather than bringing the data to a central processor (sink). Toward this end, we propose an agent based directed diffusion approach.