NOVELTY - An usage system of plant group biomass has an essential oil extraction unit (1), a gasification unit (2), an alcohol synthesis unit (3), a combustion unit (4), and a microwave alcohol synthesis unit (5). The unit (1) extracts essential oil, fragrance or pigment from biomass. The unit (2) gasifies biomass after extraction. The unit (3) produces alcohol from obtained gas. The unit (4) burns soot and tar of gasified residue. The unit (5) irradiates microwave and produces alcohol when introducing hydrogen into carbon dioxide produced by combustion unit in presence of catalyst.    USE - Usage system of plant group biomass.    ADVANTAGE - The usage system of plant group biomass suppresses generation of waste material e.g. soot and tar. The essential oil is efficiently extracted from biomass, and alcohol is manufactured.    DETAILED DESCRIPTION - An usage system of plant group biomass has an essential oil extraction unit (1) for extracting and removing intracellular substance such as protein in plant group biomass, and nucleic acid, a gasification unit (2), an alcohol synthesis unit (3), a combustion unit (4), and a microwave alcohol synthesis unit (5). The unit (1) extracts essential oil, fragrance or pigment using water as solvent from biomass. The unit (2) gasifies biomass after extraction. The unit (3) produces alcohol from obtained gas. The unit (4) burns soot and tar of gasified residue. The unit (5) irradiates microwave and produces alcohol when introducing hydrogen into carbon dioxide produced by combustion unit in presence of catalyst.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of usage system of plant group biomass. (Drawing includes non-English language text)    Essential oil extraction unit (1)    Gasification unit (2)    Alcohol synthesis unit (3)    Combustion unit (4)    Microwave alcohol synthesis unit (5)    Filtration unit (6)    Predrying unit (7)    Cooling unit (8)    Gas purification unit (9)    Gas compression unit (10)    Electrolysis unit (13)