Polarization and Depolarization Current (PDC) and Frequency Domain Spectroscopy (FDS) measurements are common dielectric response tests in time and frequency domain that are widely used to diagnosis insulation status in power transformer companies. Numerous factors affect the PDC and FDS test results, which the most important of them is temperature variation. To accurately interpret the results of the dielectric response, the effect of temperature on the results in time and frequency domains, must be corrected in order to make a proper assessment of the condition of the insulation system. In this paper, by using the correlation between the dielectric response results in time and frequency domain, the temperature effect in the PDC test results is corrected with the help of the temperature correction in FDS results.