Abstract: Thermography is the noninvasive technique that measures emitted heat and displays this temperature as a picture. Inflammation can be determined by using a medical thermogram. The techniques involve contacting and noncontacting device; noncontacting thermography is very accurate for detecting infrared radiation. Thermography is a useful imaging tool to evaluate diagnosis of certain lameness conditions in the horse and also to allow appropriate treatment that can be applied before some clinical signs occur. This review is intended to present instrumentation and applications of thermography in equine medicine.