A cogeneration system comprising: a high-temperature operative fuel cell configured to generate electric power through a power generation reaction by using a fuel supplied to the fuel cell and air supplied to the fuel cell; a reformer configured to generate a reformed gas which becomes the fuel, through a reforming reaction between a raw material gas supplied to the reformer and a steam supplied to the reformer, by utilizing power generation reaction heat generated in the high-temperature operative fuel cell and combustion heat of unconsumed fuel; a vaporizer configured to generate the steam to be added to the raw material gas supplied to the reformer by utilizing the power generation reaction heat and the combustion heat; and a cooling apparatus configured to cool a target by consuming a portion of the power generation reaction heat and a portion of heat of an exhaust gas having the combustion heat which remain after the reformer and the vaporizer have consumed the heat, and cool the exhaust gas by consuming a portion of the heat; the cogeneration system characterized by further comprising: a condensation unit configured to cool the exhaust gas after the cooling apparatus has consumed the portion of the heat owned by the exhaust gas to condense a moisture contained in the exhaust gas to generate condensed water, wherein the cooling apparatus is an absorption cooling apparatus which causes a cooling medium to be absorbed into an absorbing liquid and circulates the absorbing liquid; and wherein the cooling medium has a lower boiling temperature than the absorbing liquid; the cogeneration system further comprising: a first heat exchanger configured to exchange heat between the exhaust gas and the absorbing liquid containing the cooling medium to separate the cooling medium from the absorbing liquid containing the cooling medium; wherein the absorbing liquid containing the cooling medium is vaporized by heat attained by the heat exchange performed by the first heat exchanger. a high-temperature operative fuel cell configured to generate electric power through a power generation reaction by using a fuel supplied to the fuel cell and air supplied to the fuel cell; a reformer configured to generate a reformed gas which becomes the fuel, through a reforming reaction between a raw material gas supplied to the reformer and a steam supplied to the reformer, by utilizing power generation reaction heat generated in the high-temperature operative fuel cell and combustion heat of unconsumed fuel; a vaporizer configured to generate the steam to be added to the raw material gas supplied to the reformer by utilizing the power generation reaction heat and the combustion heat; and a cooling apparatus configured to cool a target by consuming a portion of the power generation reaction heat and a portion of heat of an exhaust gas having the combustion heat which remain after the reformer and the vaporizer have consumed the heat, and cool the exhaust gas by consuming a portion of the heat; a condensation unit configured to cool the exhaust gas after the cooling apparatus has consumed the portion of the heat owned by the exhaust gas to condense a moisture contained in the exhaust gas to generate condensed water, a first heat exchanger configured to exchange heat between the exhaust gas and the absorbing liquid containing the cooling medium to separate the cooling medium from the absorbing liquid containing the cooling medium;