The high-quality raw gas generated by the gasifier, after being cooled, dedusted and separated from tar, will be sent into the water-gas shift reactor through the gas compressor to have reaction with the vapor. This is to adjust the hydrogen-carbon ratio of the raw gas. Then the adjusted syngas, after the process of desulfurization, denitrification and decarbonization, will be transferred into the dedicated fuel synthesis unit for generation of green methanol and aviation kerosene. Thus we can use it as alternative to fossil fuel.