The invention discloses a heating method for asphalt in an asphalt well. The bottom end of an electric heating element is inserted into the asphalt; as the electric heating element radiates heat, the asphalt being contact with the electric heating element is softened and flows; at the moment, the electric heating element is controlled to be inserted into the asphalt well through an operating rod until the electric element reaches to the required buried depth; the operating rod is fixed; the electric heating element is kept to be heated in the buried depth until all of the asphalt above the buried depth are heated to the target temperature; after the heating process is completed, the electric heating element is pulled out of the asphalt well gradually through the operating rod, so that the liquid level of the asphalt in the asphalt is lowered; the asphalt well is supplemented with the asphalt. According to the heating method, the asphalt in the asphalt well can be heated effectively under the condition that a heating electrode is out of operation; the heating temperature is controlled well so as to prevent danger. The invention further discloses a heating device, adopting the heating method, for the asphalt in the asphalt well.