The invention discloses a heating device and an electronic cigarette applying the heating device. The electronic cigarette comprises a battery component, the battery component is provided with a installing chamber having an opening, the heating device comprises a heating base and a hollow sleeve, the sleeve is detachably mounted on the heating base and encircles receiving space for receiving the tobacco product together with the heating base, when the heating device is mounted in the installing chamber, the heating base is electrically connected to the battery component, and the battery component drives the heating base to heat the tobacco product received in the receiving space. The technical solution of the invention is effective for facilitating the user to clean the heating device.