Cooking utensil as well as cooking control device and method of cooking utensil

The invention provides a cooking utensil as well as a cooking control device and method of the cooking utensil. The cooking utensil comprises a cover body and an inner pot; a cooking space is defined between the cover body and the inner pot; the device comprises a capacity adjusting module used for adjusting the capacity of the cooking space, a driving module connected with the capacity adjusting module, and used for driving the capacity adjusting module, and a control module connected with the driving module; and the control module is used for obtaining the cooking state in an inner pot and controlling the capacity adjusting module through the driving module when the inner pot is in a preset cooking state so that the capacity of the cooking space can be increased at least once, and therefore the capacity of the cooking utensil can be increased; negative pressure can be generated in the cooking utensil, and the cooking effect of the cooking utensil can be improved; by means of the negative pressure, a steam d