The invention discloses a gas making and poly-generation apparatus by using environmental friendly clean fuel gas. The apparatus is composed of a main furnace of a gasification furnace and a heat exchange and separator equipped with an automatic control system, which realizes automatic intellectualized operation. The apparatus can gasify any coal, for instance, soft coal, anthracite, coke, stone coal; and gasify (carbonize) biomass for instance, wood, bamboo, cotton stalk, rice hull and rubbish rod. When gasifying coal, by-products in gas making and purifying process can be recycled in the apparatus. Coal tar in the by-products can be pyrolyzed and gasified to make gas, residual heat making vapor for power generation of steam turbine, which realizes poly-generation and recycling. When gasify (carbonize) biomass, biomass diesel oil, acetic acid in coal producing, gas making and purifying process can be recycled in the apparatus, , residual heat making vapor for power generation of steam turbine, which realizes poly-generation and recycling. The poly-generation apparatus ensures environmental protection of whole gas making process in structure. The invention, except clinker, is of zero emission and pollution.