Abstract: An oven equipped with a detachable steam device includes an electric connecting portion. The steam device includes a body which has a water reservoir, a heater, a power cord and a steam ejection head. The water reservoir is connected to the heater. The power cord is electrically connected to the electric connecting portion. The steam ejection head is connected to and communicates with the water reservoir. Hence high temperature steam can be sprayed timely at a desired amount onto the surface of foodstuffs located outside or inside the oven through the steam ejection head, and the foodstuffs with varying sizes or characteristics can be baked at the same time to improve baking convenience and practicality and also make the baked foodstuffs more tasty.