This paper introduce the basic concept of intelligent agent. In artificial intelligence, an intelligent agent (IA) is an autonomous entity which observes and acts upon an environment and directs its activity towards achieving goals. Intelligent agents may also learn or use knowledge to achieve their goals. They may be very simple or very complex. Exp: A reflex machine such as a thermostat is an intelligent agent, as is a human being, as is a community a human beings working together towards a goal. An agent: An agent is anything that can be viewed as perceiving its environment through sensers and acting upon that environment through effectors. A human agent has eyes, Ears and other organs for sensors, and hands, legs, mouth, and other body parts of effectors.