NOVELTY - The aqueous methanol flows through the heating tube (124) to the evaporation portion which forms methanol vapor. A hot spot which is built in the modifier changes methanol vapor to super heated methanol vapor. The combustion gas formed in the burner by passing exhausted fuel and air from hydrogen pole (16) and oxygen pole (17) respectively, is supplied to the evaporation portion.    DETAILED DESCRIPTION - The ratio in which methanol and water are mixed to form aqueous methanol solution is 1:1.5-1:2.0. Combustion gas is formed by burning exhausted fuel with air from exhaust air inlet and is diluted by air from another exhaust air inlet. The combustion gas is first supplied to the perimeter of heating tube in order continuously to the modification reaction portion which forms modified gas. The CO density of modified gas is reduced by passing it through the CO transformer and heating gas is formed. The CO transformer (14) contains integrally a low- temperature CO transformation catalyst layer and selective oxidation catalyst layer. The cooling water supplied by cooling water pump to the main portion of the fuel battery (15) is passed in order to the low-temperature CO transformation and selective oxidation catalyst layers. The air exhausted from the oxygen layer is guided to the selective oxidation catalyst layer. The heating gas is supplied to hydrogen pole an air is supplied by an air blower to the pole. By the electrochemical reaction of air and heating gas electrical energy is produced.    USE -   The fuel battery plant is used for generating electrical energy using methanol as fuel.    ADVANTAGE -   Since aqueous methanol is used as fuel, water vapor required for steam reforming of methanol is secured even if the operating temperature of the fuel battery is low. Cost is reduced, and it is compact.    DESCRIPTION OF DRAWING(S) - The figure shows block diagram of the fuel battery plant. (14) CO transformer; (15) Main portion of fuel battery; (16) Hydrogen pole; (17) Oxygen pole; (124) Heating tube.