Converter valve is the core equipment of UHVDC converter station,and the reliability of its key components is related to the stable operation of the whole transmission system.By studying the theory of infrared temperature measurement technology and combining the environmental characteristics of converter valve,an infrared temperature measuring algorithm suitable for the key components of converter valve is proposed.The infrared temperature measurement experiments are carried out for the valve components with different materials and different infrared radiation levels.The different values of the parameters in the infrared temperature measurement algorithm are obtained,and the accuracy of temperature measurement is verified.Finally,the design of infrared temperature measurement device and infrared imaging effect verification are completed by using laser energy supply technology.