The utility model provides a valve leakage detecting system based on infrared thermal imaging technology belongs to the valve prison and examines technical field. The utility model provides a valve be difficult to realize in remote leak testing, infrared thermal imaging technology is subject to the inhomogeneous interference of emissivity, the infrared thermal imaging result receives the temperature condition to change the interference, valve leakage detects the relatively poor and higher class of technological problem of detection cost of precision, valve remote pressure testing leak testing in has been explored, not -contact temperature measuring with infrared thermal imaging technology, the advantage of quickly capture hot spot is used in leak testing, realized the precision measurement of leakage point position and the deciding grade and level analysis of letting out leakage quantity, the inhomogeneous technological problem who brings the interference of emissivity has been solved, possesses very high detection precision, reasonable detection cost, there is very considerable popularization prospect.