Abstract: Oil conservator, as a key auxiliary equipment of transformer, might cause false oil level due to a breathing failure, which leads to a false alarm and eventually brings about a gas protection accident from time to time. The infrared temperature measurement technology is available to confirm the typical infrared thermograms of oil conservators both in the normal and abnormal operation of transformers according to the inner structure of an oil conservator and its breathing mechanism, based on which the accuracy of the proposed typical infrared thermograms is verified, offering reference for running status analysis of transformer oil conservators.