The paper introduces a partial research result of a project that is“The Investigation of evolution and diagnosis using infrared heat picture for high temperature furnace tubes on Iine”,which is rewarded project . The research result show the inspection of heating fumace tubes on line can be operated through view window using Infrared heat picture , If using high temperature flame filter and wide angle lenses and heat insulation cover like PM350 type Infrared heat picture instrument . The error－correcting methods by experiment research can improve inspection result of infrared heat picture , It makes the inspection error between Infrared and thermocouple smaller thea 2 % , The application in the plant showed effective results ,This method can satisfy requirement of inspection for production equipment .