The invention discloses a multi-purpose energy saving cookstove. The multi-purpose energy saving cookstove is composed of a water valve for floor heating, a stove base, a furnace bar, a floor heating water tank, a floor heating hot water inlet switch, a boiled water spigot, a water tank water level control spigot, a boiled water draining pipe, a steam connection pipe, a steam valve, an iron pan, an annular boiled water tank, a water inlet pipe, a water inlet switch, a chimney, a chimney gate plate, a furnace door, a furnace hearth and an air inlet. The iron pan is arranged over the furnace hearth and located at the center of the furnace hearth, the boiled water tank is arranged under the iron pan and located at the periphery of the pan bottom, and the floor heating water tank is arranged below the boiled water tank and at the periphery of the furnace hearth; a water inlet and a steam outlet are formed in the upper portion of the side face of the boiled water tank, the water inlet is connected with the water inlet pipe, and the steam outlet is connected with the steam connection pipe and the water tank water level control spigot; a water outlet is formed in the bottom of the side face of the boiled water tank; water can be boiled or steam can be generated to steam objects in another steaming pan while cooking is conducted, and meanwhile water can be heated for floor heating; the burning fire strength can be controlled and the cooking speed can be regulated according to the flavor requirement of meal. The cookstove has the function of achieving multiple purposes through one cookstove.