Conventional infrared temperature measurement sensors consist of two types of sensors:a thermo-electric element for measuring the target temperature of the object to be measured and a thermistor for measuring the ambient temperature.This paper proposes a novel temperature measurement method that enables dual-mode switching by using a single thermo-electric element and its analog-digital (AD) module and positive channel metal oxide semiconductor (PMOS) circuit to achieve infrared sensor temperature measurement and ambient temperature compensation in one measurement cycle.The TSMC (Taiwan Semiconductor Manufacturing Company) 0.35 μm complementary metal oxide semiconductor (CMOS) process is used to manufacture the infrared sensor,and test and experiment are conducted according to the dual-mode swithing method after the temperature calibration of the infrared sensor is completed .The average error of temperature measurement is less than 0.01 ℃ after temperature compensation,which greatly improves the measurement accuracy and ambient temperature compensation accuracy,reduces the dynamic temperature measurement error,and simplifies the design and manufacturing process of the infrared temperature sensor.It has a very good practical value.