A network system is provided. The network system includes: a utility area network including at least an energy generation component; a home area network including an energy consumption component that consumes an energy generated from the energy generation unit and includes at least one control unit for driving; and a communication module allowing communication between the energy consumption component and an external component constituting the utility area network or the home area network, wherein the communication module is disposed on a path through which a power applied to drive the energy consumption component is delivered to the control unit.