Outlet for smart grid

PURPOSE: A socket for a smart grid is provided to automatically block or cancel the power supply to the load device which uses electricity according to the changed electric price. CONSTITUTION: A price information communication unit(11) is provided to receive electric price information by being connected to the electric price information providing device and a communication unit. A price display unit(12) displays electric price information received from a price information communication unit in visual form. A power control unit(13) compares an electric price and reference price received from a price information communication unit. The power control unit connects or blocks the power to the load device.