A wireless sensor network is a collection of nodes organized into a cooperative network. Each node consists of processing capability may contain multiple types of memory, have a RF transceiver, have a power source (e.g., batteries and solar cells), and accommodate various sensors and actuators. This paper presents a review of intelligent agent operating in Wireless Sensor Network (WSN) communication system. It shows that, to improve the WSN system performance many researcher proposed the literature survey given in this paper, gives brief idea on the techniques which are proposed for performance improvement of WSN communication systems. Though, the proposed paper in the literature addressed various issues in implementation of WSN system.