NOVELTY - Integrating production process of synthetic natural gas and process of fuel cell, comprises (a) generating oxygen in an air separation unit using air, (b) generating carbon monoxide in a gasifier using oxygen and coal, (c) generating hydrogen in a water gas shift reactor using the obtained carbon monoxide, (d) generating water and methane gas in a methanation reactor using hydrogen and carbon monoxide, (e) generating power by supplying methane gas coming out from the methanation reactor to fuel cell, and (f) supplying some portion of water coming out from the methanation reactor to fuel cell.    USE - The method is useful for integrating production process of synthetic natural gas and process of fuel cell (claimed).    ADVANTAGE - The method effectively utilizes energy, reduce equipment cost, and minimizes emission of carbon dioxide thus is environmentally friendly.    DETAILED DESCRIPTION - Integrating production process of synthetic natural gas and process of fuel cell, comprises (a) generating oxygen in an air separation unit (11) using air, (b) generating carbon monoxide in a gasifier (12) using oxygen and coal, (c) generating hydrogen in a water gas shift reactor (14) using the obtained carbon monoxide, (d) generating water and methane gas in a methanation reactor (18) using hydrogen and carbon monoxide, (e) generating power by supplying methane gas coming out from the methanation reactor to fuel cell, and (f) supplying some portion of water coming out from the methanation reactor to fuel cell; or (a), (b), (c), (d), (e), and (f), inflowing some portion of oxygen coming out from the air separation unit to the gasifier, supplying the remaining amount of oxygen to the fuel cell, recycling by supplying carbon monoxide discharged from the fuel cell to the water gas shift reactor.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the equipment for integrating production process of synthetic natural gas and process of fuel cell (Drawing includes non-English language text).    Air separation unit (11)    Gasifier (12)    Water gas shift reactor (14)    Gas cooler (15)    Methanation reactor (18)