The invention discloses an industrial smelting furnace heating method. The industrial smelting furnace heating method is characterized by comprising the steps that a surface temperature value of a crucible is detected; a temperature value of the central position of an object to be molten in the crucible is detected; the difference of the surface temperature of the crucible and the temperature at the central position of the object to be molten is calculated; whether the temperature difference is greater than a preset difference value or not is judged; if the temperature difference is not greater than the preset difference value, whether the surface temperature of the crucible is greater than a preset temperature value or not is judged; if the surface temperature of the crucible is greater than the preset temperature value, crucible heating is stopped, and buzzing is given out. According to the method, no heat crack is produced by controlling intermittent crucible heating, and electric energy can be also saved. In addition, the crucible does not exceed a curie point due to local temperature rise. In addition, when the surface temperature of the crucible reaches the certain temperature higher than the melting point of the object to be molten, crucible heating is stopped, and buzzing is performed to remind a user of complete melting of object to be molten.