Energy-saving cooking/bathing stove capable of using firewood or coal

The utility model discloses a coal and firewood fired energy-saving cooking and bath furnace, which comprises a furnace stage (1), a thermal insulator (3), a water tank (4), a grate (6) and a furnace core (23). A cylindrical pipe (2) is arranged in the water tank and hermetically connected with the water tank as a whole body; a lateral air inlet pipe (2) is arranged on the side surface at the lower end of the cylindrical pipe; an upper air inlet pipe (18) is arranged at the upper end opening of the cylindrical pipe and penetrates the bottom part of the water tank; a lower air inlet pipe (14) is arranged at the lower part of the cylindrical pipe; a lifting mechanism which can regulate the height of an inner furnace bar of the cylindrical pipe is arranged on the grate; the movable furnace core is arranged on the furnace bar; and an circular smoke channel (20) communicated with an upper flue pipe is arranged between the furnace stage and the thermal insulator (3). According to the season and the usage of hot wat