The invention discloses a kettle device, which comprises a heating base and a kettle body which is matched with the heating base, wherein a clamping groove is formed in the heating base, and an opening groove, which communicates with outer side, is arranged at the front end of the clamping groove; fixed power-connecting grooves are arranged in the wall of the back end of the clamping groove in a mode of being longitudinally opposite; first power-connecting sheets are arranged in the fixed power-connecting grooves; a movable block is arranged in the clamping groove in a mode of moving back and forth; an inserting groove with an opening facing front end is arranged in the front end face of the movable block; first guide grooves with openings facing the inserting groove are arranged in the movable block in a mode of being longitudinally opposite, and second guide grooves with ports kept back away from the inserting groove are additionally arranged in the movable block in a mode of being longitudinally opposite; communicating grooves are arranged between the first guide grooves and the second guide grooves, and engaging wheels are arranged in the communicating grooves in a rotatable mode; and teeth of the engaging wheels are exposed out of the first guide grooves and the second guide grooves.