NOVELTY - Recovering method of carbon dioxide involves producing reformed gas, carrying out synthesis of methanol, carrying out combustion which burns fuel gas, collecting carbon dioxides from combustion exhaust gas emitted by the combustion, obtaining reformed gas, and the thermal medium of methanol from the reformed gas and the methanol, removing carbon dioxide from the absorption liquid, and regenerating the absorption liquid by heating in which the absorption liquid which absorbed the carbon dioxide using the some thermal medium with which the temperature differs.    USE - Recovering method of carbon dioxide (claimed).    ADVANTAGE - The method enables effective recovery of carbon dioxide.    DETAILED DESCRIPTION - Recovering method of carbon dioxide from hydrocarbon gas involves producing reformed gas by steam reforming reaction of hydrocarbon gas, carrying out synthesis of methanol from the reformed gas, carrying out combustion which burns fuel gas in order to obtain the heat source of the steam reforming reaction, collecting carbon dioxides from combustion exhaust gas emitted by the combustion using absorption liquid, obtaining reformed gas or reformed gas which differs in temperature, and the thermal medium of methanol from the reformed gas and the methanol, removing carbon dioxide from the absorption liquid, and regenerating the absorption liquid by heating in which the absorption liquid which absorbed the carbon dioxide using the thermal medium with which the temperature differs. An INDEPENDENT CLAIM is included for carbon dioxide recovery system, which comprises modifier which produces reformed gas by steam reforming reaction of hydrocarbon gas, methanol synthesis apparatus which synthesizes methanol from the reformed gas, combustion apparatus which burns fuel gas in order to obtain the heat source of steam reforming reaction with the modifier, container for carbon dioxide absorbent which recovers carbon dioxides from combustion exhaust gas emitted with the combustion apparatus using absorption liquid, reformed gas or heat exchanger (33) which uses the reformed gas and the methanol as reformed gas or reformed gas which differs in temperature, and a thermal medium of methanol, absorption liquid regenerating apparatus which removes a carbon dioxide from the absorption liquid, and regenerates absorption liquid by heating the absorption liquid which absorbed the carbon dioxide with the thermal medium from which the temperature differs with the heat exchangers.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of carbon dioxide recovery system.    Regeneration tower (10)    Chimney tray (15)    Reboiler (20A, 20B)    Heat exchanger (33)    Absorption tower (40)