The invention discloses a furnace taking coals as fuels. The furnace is characterized in that an upper cover plate (9) convenient to take down is arranged on the center of the upper surface of a furnace panel (2), wherein the center of the furnace panel (2) is downwards connected with a cylindrical ring-shaped tempering ring (12); the tempering ring (12) is downwards connected with a furnace core(10) of the furnace and a furnace body; the middle part of the furnace core (10) is equipped with a charge door (5) which is accessed to the outside of the furnace body for adding fuels; the bottom ofa charge door (5) on the lower part of the furnace core (10) is equipped with a furnace bridge (13); the bottom of the furnace bridge (13) is equipped with an ash residue hopper (6) which can extractoutwards; and the furnace core (10) and the bottom of the furnace body are connected with a base (7) which supports weight of a furnace body (1). The furnace taking coals as fuels can be widely applied to daily life of people, and is especially suitable for household use and being used in restaurants.