This review presents infrared thermography (IRT) as a tool studying and evaluating the milking process. IRT is a noninvasive and non-contact heat-detecting technology, an infrared camera measures and images the infrared radiation emitted from an object.A specially analysing software program evaluates the thermal images (thermograms). Although IRT is applied less frequently to the study of the milking process, present results show the potential of this measuring method. Generally, IRT is a suitable toolfor early detection and screening of mastitis, and can be useful for studying and evaluating the effects of different milking technique on teats and udders. Important information can be produced where the possibilities diagnostic techniques have been exhausted.