In most steamers, different modes and functions are provided to adapt to different ingredients and cooking methods. For sweet potatoes that need to be kept moist and heated evenly, the function of "steam baking" is a more suitable choice. The function of "steam baking" is to create a high-temperature and humid environment by injecting water, so as to keep the food moisture heated evenly. It can soften the inside of sweet potato and form golden crispy skin on the outside, which can better lock its natural sweetness.