Lingual orthodontic system

The present invention relates to a lingual orthodontic system comprising: an elastic material first wire formed along a boundary line of a lingual surface and gum at an upper jaw anterior tooth part; a first hook having one end connected with a first wire, having the other end formed in a ring shape, and formed in the shape of the hard palate from one end to the other end; a first fixing circle having one end transplanted in the hard palate, and having the other end exposed to the top of the hard palate, wherein the other end includes a bone screw-shaped fixing means; a towing device fixed on a hard palate surface by the first fixing circle, and including two or more ring shapes; a wire fixing unit attached to the hard palate surface of a canine tooth at the upper jaw anterior tooth part; a slot formed in a penetration shape, attached to the hard palate surface of the upper jaw molar tooth part, and connected with a hook for towing the gum of the upper jaw molar tooth part; a second wire having one end fixed to the wire fixing unit, and having the other end penetrating through the slot; a first elastic rubber string for connecting the ring shapes of the first hook and the ring shapes of the towing device, and providing towing power in a tooth root direction of the upper jaw anterior tooth part; and a second elastic rubber string for connecting the hook connected with the slot and the ring shapes of the towing device, and providing towing power in a tooth root direction to the molar tooth part connected with the slot.