2. Although the traditional steamer also uses steam to cook food directly, it adopts a transparent ascending steaming method, which can't reach high temperature, omni-directional and sealed micro-pressure cooking, so it can't be called pure steaming. Moreover, in the steaming process, with the rising process of steam from bottom to top, many water drops will be formed on the surface of food, diluting the flavoring agent of food. At the same time, the steam generation process of steamer is slow and uneven, and the taste of food can not achieve the purest effect, so it can not represent the pure steaming technology and technology, and can not bring the healthiest steamed food to people.