Power saving system and method using ethernet network based multi-outlet

PURPOSE: A power saving system using a multi outlet based on Ethernet communication and a method thereof are provided to combine a multi outlet with an Ethernet switching hub to manage an Ethernet port and the multi output and the Ethernet switching hub connected to a corresponding outlet, thereby operating and turning on/off an information communication device. CONSTITUTION: A power input/output controller(110) comprises a main power(111), a power input/output outlet(112), a power control unit(113), and a current sensor(114). Each input/output outlet is combined with a communication port(121) of an Ethernet switching hub block(120). A processor(130) grasps whether a specific information device is connected to one power outlet by monitoring a coupled state.