Syndrome elements of TCM five zang viscera cold and heat are five zang viscera and cold and heat respectively, reflecting disease position and nature of disease. Infrared thermogram recognizing methods could identify peripheral temperature changes sensitively, study on the relation between TCM five zang viscera cold and heat syndrome element characteristics and infrared thermogram could provide new ideas on digitization and objectification of TCM syndrome differentiation and new methods on clinical treatment. This paper aimed at discussing principles and research methods of infrared thermogram...