Abstract: Describe the basic principle of underground coal gasification and market prospect of its products.Emphasize the low carbon feature of this technology,which specifically manifests in mining energy consumption,mining methods,increase of thermal efficiency.This feature is benefit for carbon capture and sequestration.It also plays an important part in energy conservation and CO2 emission reduction.The recycling of CO2,reduction of shaft engineering,CO2 emission of scrap mines as well as gangue hills’ spontaneous combustion,simultaneous mining of methane and coal all illustrate that underground coal gasification is a natural,energy-saving and low-emission mining method.