Open flow network system and method of controlling the same

PURPOSE: An opened flow network system and control method thereof are provided to move traffic by determining flow according to network states and by dynamically allocating traffic transmission routes. CONSTITUTION: A controller creates forwarding information for flow by reflecting requests of a user and flow information received from an opened flow switch unit(20). The controller transmits the forwarding information for the flow to an opened flow switch unit by changing the type of the forwarding information into a flow entry type. The opened flow switch unit receives the flow entry type forwarding information for the flow from the controller. The opened flow switch unit manages traffics based on forwarding rules included on a list.