Abstract: The characters of low carbonization of exploitation energy consumption,low carbonization of mining method,high heat efficiency and availing carbon capture and sequestration of underground coal gasification are illustrated by data in this paper,thus its important role in energy-saving and emission-reduction is demonstrated.The excellent characteristics including cyclic utilization of CO₂,reduction of shaft engineering,reduction of scrap mines and spontaneous combustion in gangue hills,simultaneous mining of methane and coal make underground coal gasification a nature mining way of energy saving.