To explore theforeground of the applications of the Infrared Thermography on the metal cutting, theInfrared Thermography device is used to monitor and survey the manufacturing procedures,such as metal cutting, heat treat and welding, also the conditions of heat treat ovens,and the IR thermography images have been gained for the temperature distribution incutting area for lathing, planing, milling and welding processing, validated thedescription in the corresponding theories and references. The Infrared Thermography issuggested for the research projects on the metal cutting and determining the processingparameters for next period. In practice, a field survey has been made on the inner/outsidewall and electric parts of a large heat treat oven for its delivery trial running. As aresult, some areas with partly overheats have been found, which due to the insulatematerials are not filled evenly and electric cables/fuses/switches are conducted badly,the result of this field survey finally has been as an evidence for the repair plan of the oven.