The invention provides a movable smoke hood of a converter smoke system. The movable smoke hood comprises a ring beam, a connecting part and a ring beam cooling system, wherein the connecting part outwards extends from the ring beam and is connected with a lifting mechanism of the movable smoke hood; and the ring beam cooling system is connected with the ring beam. In the invention, on the premise of guaranteeing steel-making production, the service life of the movable smoke hood is prolonged, the coal gas quality is improved, the movable smoke hood is convenient to operate and overhaul, and the economic benefit is improved.