High precision measurement of temperature changes is of great significance in modern technology. It is usually hard to measure ultrasensitive temperature changes directly. Based on the fact that temperature changes can cause the phase changes between the o and e light, a polarization dependent weak-value-based system is constructed to amplify these phase changes that will alter the intensity of detected light, from which the temperature changes of multi order quartz wave plate can be inferred.. The precision can reach 0.0042℃, which is 9 times higher than the balanced homodyne detection.