Steam generating device and control method thereof, and steam box and control method thereof

The invention discloses a steam generating device and a control method thereof, and a steam box and a control method thereof. The steam generating device comprises a first steam generator, a second steam generator, a circuit connecting piece and a storage battery, the first steam generator and the second steam generator are both installed on a box body of the steam box and convey hot steam into the box body. The circuit connecting piece is used for electrically connecting the first steam generator with an external circuit; and the storage battery is electrically connected with the second steam generator. According to the steam generation device, the two steam generators are arranged to heat the interior of the steam box at the same time, so that temperature rise in the steam box is accelerated, the cooking speed of food is increased, and the cooking experience of a user is improved; the storage battery is arranged to supply power to the second steam generator, so that the two steam generators can work and run at the same time under the condition that the power limit of the household appliance is not exceeded, the power limit of the household appliance is broken through, the steam amount in the steam box can be increased, and the temperature rising speed in the steam box is increased.