The invention discloses an inspection gallery, characterized by comprising a ladder stand and a plurality of inspection platforms which are parallelly distributed up and down, and are provided with windows, and a slidable cover plate used for covering the windows, wherein adjacent inspection platforms are in connection through the ladder stand. The beneficial effects are as follows: (1) a converter valve tower is internally provided with the inspection gallery, thereby facilitating later repair and maintenance; (2)maintenance and operation personnel utilize the ladder stand and the windows on the inspection platforms to move among different valve layers to complete all operations in the converter valve tower, need not face the high altitude, have no fear, and are safer; and (3) the ladder stand is carried with the personnel, is directly brought down from the valve tower after inspection, and can neither influence interlayer insulation of the valve tower nor increase the long-term weight of the valve tower in operation.