A dehumidifying cooling device for district heating comprising: - a case having a partition to divide the interior of the case into a wet channel and a dry channel, the wet channel being provided, at one end thereof, with an outside air suction hole for introducing outside air into the wet channel and, at the other end thereof, with an exhaust hole for discharging the outside air, the dry channel being provided, at one end thereof, with a circulated air suction hole for introducing circulated air from a conditioning space into the dry channel and, at the other end thereof, with an air supply hole for supplying cooling air into the conditioning space; - a sensible heat exchanger configured to rotate about the partition and serving to heat exchange the outside air, introduced into the wet channel through the outside air suction hole, with the circulated air introduced into the dry channel; - a heating coil installed in the wet channel at a position between a rear end of the sensible heat exchanger and the exhaust hole and serving to raise the temperature of the outside air passing through the wet channel by use of heat of hot water introduced into the heating coil; - a dehumidifying wheel configured to rotate about the partition at a position behind the heating coil and serving to adsorb and remove moisture contained in the circulated air within the dry channel, the dehumidifying wheel being regenerated by evaporating the adsorbed moisture to thereby supply the evaporated moisture into the high-temperature outside air in the wet channel; characterized by - a regenerative-evaporative cooler installed in the dry channel at a position between the circulated air supply hole and the sensible heat exchanger and serving to cool the circulated air in the dry channel, which was dehumidified to high-temperature dry air by the dehumidifying wheel and subsequently, heat exchanged and cooled by the sensible heat exchanger, the cooled circulated air being delivered to the air supply hole of the case. - a case having a partition to divide the interior of the case into a wet channel and a dry channel, the wet channel being provided, at one end thereof, with an outside air suction hole for introducing outside air into the wet channel and, at the other end thereof, with an exhaust hole for discharging the outside air, the dry channel being provided, at one end thereof, with a circulated air suction hole for introducing circulated air from a conditioning space into the dry channel and, at the other end thereof, with an air supply hole for supplying cooling air into the conditioning space; - a sensible heat exchanger configured to rotate about the partition and serving to heat exchange the outside air, introduced into the wet channel through the outside air suction hole, with the circulated air introduced into the dry channel; - a heating coil installed in the wet channel at a position between a rear end of the sensible heat exchanger and the exhaust hole and serving to raise the temperature of the outside air passing through the wet channel by use of heat of hot water introduced into the heating coil; - a dehumidifying wheel configured to rotate about the partition at a position behind the heating coil and serving to adsorb and remove moisture contained in the circulated air within the dry channel, the dehumidifying wheel being regenerated by evaporating the adsorbed moisture to thereby supply the evaporated moisture into the high-temperature outside air in the wet channel; characterized by - a regenerative-evaporative cooler installed in the dry channel at a position between the circulated air supply hole and the sensible heat exchanger and serving to cool the circulated air in the dry channel, which was dehumidified to high-temperature dry air by the dehumidifying wheel and subsequently, heat exchanged and cooled by the sensible heat exchanger, the cooled circulated air being delivered to the air supply hole of the case.