With　improvements　in　infrared　camera　technology　and　the　promise　of　reduced　costs　and　noninvasive　character,　infrared　thermal　imaging　resurges　in　medicine.　The　skin　temperature　distribution　of　a　healthy　human　body　exhibits　a　contralateral　symmetry.　Any　disease　inside　body　is　associated　with　an　alteration　of　the　thermal　distribution　of　human　body.　So　human　thermography　is　of　unique　value　in　studying　the　physiology　of　thermoregulation,　diagnosing　some　diseases　or　evaluating　the　situation　of　human　health.　The　physical　principle　of　human　thermography　and　its　clinical　applications　are　discussed.　The　latest　progress　of　thermography,　thermal　texture　maps　(TTM)　and　its　effectiveness　are　introduced.