Patent ID: 7944341

Claim:
A network system with a network server and more than one device being connected comprising: a main power supply means for converting an AC power into a DC power to provide the DC power to the more than one device; and a DC power bus for providing a supply path of the DC power converted by the main power supply means, wherein the main power supply means comprises more than one power breaker for allowing the DC power to be provided or interrupted to each area; the network server controls on/off operation of the power breakers by confirming a current state of the more than one device; and wherein the network server classifies a location corresponding to at least one of a living room, a bedroom, a library, and a front door at home as a one area, combines state information of the device located in the area with a state information of the power breaker that provides or interrupts the power to the area, and stores and manages them as power management information.