A baking device comprises a casing, two material barrels, a power unit driving the rotation of the material barrels and a heating unit.The shell includes a shell defining a holding space and a preheating space, an air inlet connecting the holding space and the preheating space, and an air outlet connecting the holding space and the outside.The drums are rotatably arranged in the holding space. Each drum includes a surrounding wall with a filler opening and a heating space defining a corresponding air inlet, a cover which is arranged on the surrounding wall and can close the filler opening, two end walls which are respectively arranged on both ends of the surrounding wall, and several end walls which are distributed between the surrounding wall and the cover and connect the holding space and the cover. Through hole for heating space.The heating unit includes an exhaust member and two heating members arranged in the preheating space.一種烘焙裝置，包含一機殼、二料筒、一驅動該等料筒轉動的動力單元及一加熱單元。該機殼包括一界定出一容置空間與一預熱空間的殼體、二連通該容置空間與該預熱空間的進風口，及一連通該容置空間與外界的排風口。該等料筒可轉動地設置於該容置空間，每一料筒包括一具有一填料口並圍繞界定出一連通相對應之進風口之加熱空間的圍繞壁、一設置於該圍繞壁且可封閉該填料口的封蓋、二分別設置於該圍繞壁兩端的端壁，及數個分布於該圍繞壁與該封蓋且連通該容置空間與該加熱空間的通孔。該加熱單元包括一抽風件及二設置於該預熱空間的加熱件。
