Provided are a network system and a method of controlling the network system supplied with energy from an energy generation component. The network system includes an energy consumption component consuming the energy generated from the energy generation component, and driving a driving component for processing or managing a consumable. The energy consumption component is provided with one or more courses classified according to a determination factor related to the consumable. The determination factor includes a performance factor denoting a processed or managed result of the consumable. One of the courses is recommended as a driving course when the energy consumption component recognizes information about the consumable.