The invention discloses a method for monitoring the casing temperature of a hot blast stove via an infrared imaging technology. Positions of at least five infrared imaging monitoring devices are determined on the basis of at least three groups of positions of the hot blast stove, the casing temperature of the hot blast stove is obtained on the basis of at least five infrared thermal imaging systems, and the casing temperature monitored by the at least five infrared thermal imaging systems is transmitted to a computer for processing. The at least five infrared imaging monitoring devices include the at least infrared thermal imaging systems and at least five electric holders, each infrared thermal imaging system is connected with one corresponding electric holder, and each electric holder can drive the corresponding infrared thermal imaging system to rotate horizontally and vertically. According to the invention, the at least five infrared imaging monitoring devices cover and monitor the hot blast stove comprehensively for a long time, a series problems caused by manual monitoring are overcome, and monitoring is safe and does not cause dangers.