A developer supply and recovery system used with a wet electro-photographic image forming apparatus includes a supply pump installed on a supply line to supply a developer from an ink cartridge to a development bath, a recovery pump installed on a recovery line to recover the developer from a developer container to the ink cartridge, an overflow sensor installed at the developer container to sense the developer overflowing from the development bath, a control unit to control the supply pump and the recovery pump in response to a sensed value of the overflow sensor, wherein operation states of the supply pump and the recovery pump are sensed, and the developer is appropriately contained in the developer container such that air is not introduced together with the developer recovered to the recovery pump, thereby reducing noise.