The furnace adopts the environmentally-friendly smokeless barbecue oven with advanced technology produced by Korea Jusong Company. The furnace consists of a gas range, a charcoal basin, a non-stick baking tray for medical stone, an automatic air leakage closing system, a heat preservation basin, a 220V-35w self-circulating fan and an outer cylinder. Using stainless steel furnace body, through electronic pulse ignition, the baking tray with non-stick layer on the surface is heated by the combustion heat of liquefied petroleum gas or natural gas, and then the food is baked on the baking tray. The electronic pulse switch can also control the size of the flame and the temperature of the baking tray. ? With smoke elimination and purification function, the smoke exhaust effect can reach 95%. A small amount of residual oil fume can be discharged to the outside through the indoor ventilation and exhaust device, and there is no need to set up the conventional upper and lower smoke exhaust devices.