Biomass fuel management system and its management method

The invention relates to a biomass fuel management system and its management method. Primarily, an ID number barcode is placed on an outside of an oil bottle after an oil manufacturing end bottles produced biofuel oil. Then the oil bottle contained with the biofuel oil is transported to a consumer end. When the consumer end wants to replenish fuel oil for its liquid biomass power generation device, it can scan the barcode of the oil bottle through a sensing and identification device to identify whether it is a qualified number. If it is a qualified number, an oil hole cover of a fuel tank of the liquid biomass power generation device will be opened automatically, and if it is not a qualified number, the oil hole cover cannot be opened. The liquid biomass power generation device can be activated when the fuel oil is replenished to drive an internal combustion engine to generate mechanical energy, which is then converted by a generator into electrical energy output to produce green electricity.