A device for cooling and heating a urea solution for a construction machine, the device comprising: an engine including a cooling fan, a coolant pump, and a main cooler; a urea solution tank storing the urea solution and provided with an embedded heat exchange pipe through which first coolant (b) or second coolant (a) circulates; an additional coolant tank storing the second coolant for cooling the urea solution stored in the urea solution tank; a water pump supplying the second coolant from the additional coolant tank to the heat exchange pipe; at least one valve (V1, V2; 22) configured to be opened or closed in order to supply the first coolant by driving of the coolant pump and the second coolant of the additional coolant tank by driving of the water pump to the heat exchange pipe of the urea solution tank through a supply line, and in order to move the first coolant and the second coolant, which are heat-exchanged at the heat exchange pipe of the urea solution tank, to the coolant pump and to the additional coolant tank, respectively; and a controller outputting drive signals to a driver of the water pump in order to supply the second coolant of the additional coolant tank by the water pump through the at least one valve (V1, V2, 22) and the supply line when a temperature of the urea solution in the urea solution tank exceeds a set temperature and to a driver of the coolant pump in order to supply the first coolant by the coolant pump to the heat exchange pipe of the urea solution tank through the at least one valve (V1, V2; 22) and the supply line when the temperature of the urea solution in the urea solution tank is equal to or lower than the set temperature, and opening or closing the at least one valve (V1, V2; 22) correspondingly, wherein the device further comprising: an extra cooler dissipating heat of the second coolant by heat exchange with outside air, wherein the second coolant being supplied to the heat exchange pipe of the urea solution tank, exchanging heat with the urea solution contained therein, and then being moved to the additional coolant tank characterized in that the extra cooler is disposed in front of the main cooler to be cooled by heat exchange with outside air cooler than outside air supplied to the main cooler by driving of the cooling fan. an engine including a cooling fan, a coolant pump, and a main cooler; a urea solution tank storing the urea solution and provided with an embedded heat exchange pipe through which first coolant (b) or second coolant (a) circulates; an additional coolant tank storing the second coolant for cooling the urea solution stored in the urea solution tank; a water pump supplying the second coolant from the additional coolant tank to the heat exchange pipe; at least one valve (V1, V2; 22) configured to be opened or closed in order to supply the first coolant by driving of the coolant pump and the second coolant of the additional coolant tank by driving of the water pump to the heat exchange pipe of the urea solution tank through a supply line, and in order to move the first coolant and the second coolant, which are heat-exchanged at the heat exchange pipe of the urea solution tank, to the coolant pump and to the additional coolant tank, respectively; and a controller outputting drive signals to a driver of the water pump in order to supply the second coolant of the additional coolant tank by the water pump through the at least one valve (V1, V2, 22) and the supply line when a temperature of the urea solution in the urea solution tank exceeds a set temperature and to a driver of the coolant pump in order to supply the first coolant by the coolant pump to the heat exchange pipe of the urea solution tank through the at least one valve (V1, V2; 22) and the supply line when the temperature of the urea solution in the urea solution tank is equal to or lower than the set temperature, and opening or closing the at least one valve (V1, V2; 22) correspondingly, wherein the device further comprising: an extra cooler dissipating heat of the second coolant by heat exchange with outside air, wherein the second coolant being supplied to the heat exchange pipe of the urea solution tank, exchanging heat with the urea solution contained therein, and then being moved to the additional coolant tank characterized in that the extra cooler is disposed in front of the main cooler to be cooled by heat exchange with outside air cooler than outside air supplied to the main cooler by driving of the cooling fan. an extra cooler dissipating heat of the second coolant by heat exchange with outside air, wherein the second coolant being supplied to the heat exchange pipe of the urea solution tank, exchanging heat with the urea solution contained therein, and then being moved to the additional coolant tank characterized in that the extra cooler is disposed in front of the main cooler to be cooled by heat exchange with outside air cooler than outside air supplied to the main cooler by driving of the cooling fan.