The invention provides a thyristor converter valve reliability evaluation method of considering an operating state. A temperature field model of a thyristor is built on the basis of the fourier heat transfer law; and a formula for the temperature and the fault rate of the thyristor is provided, so that a thyristor reliability model on the basis of the operating state is built. A converter valve reliability evaluation method of considering the operating state is provided by a state partition principle. According to the method, the operating state of the system is considered in the converter valve reliability evaluation; the defect that the actual operating state cannot be considered in the existing converter valve reliability evaluation is overcome; the thyristor-based converter valve reliability evaluation accuracy can be effectively improved; and a relatively reliable basis is provided for planning and operating of a high-voltage direct-current power transmission system.