This study aims to reduce some of the disadvantages (deterioration of windings, reduction of the life cycle of insulation materials, etc.) that occur during transformers operation, which are widely used in the transmission and distribution of electrical energy. For this purpose, the temperature reduction of thermoelectric coolers in the parts where temperature is generated during transformer operation, increasing the life cycle of transformers temperature affect and increasing efficient of transformers examined. The temperature that occurs during the operation of transformers is reduced by the effect of thermoelectric elements and aluminum fans and thermoelectric elements, which are thermal coolers when they are discharged from the transformer. The efficiency of the thermoelectric effect used in the system is determined by the Seebeck method, and the factors causing temperature loss in the transformer are reduced. In the proposed method, the temperature generated on the 1500VA transformer is reduced by approximately 15-20% with thermoelectric coolers, which has caused to increase the efficiency and life cycle of the transformers.