Energy　consumption　for　space　cooling　is　increasing　in　Chinese　residential　buildings　due　to　the　extensive　use　of　split　air　conditioners.　To　build　a　comfortable　indoor　environment　and　reduce　energy　consumption,　comprehensive　understanding　about　human　thermal　requirements　of　air　conditioning　is　highly　needed.　As　a　reflection　of　human　demand　for　indoor　thermal　environment,　thermal　sensation　is　usually　under　the　effect　of　human　physiological　responses.　For　these　reasons,　a　series　of　experiments　were　conducted　in　a　climate　chamber　to　understand　human　physiological　thermal　responses　in　air　conditioning　environment.　During　the　experiments,　indoor　temperature　was　kept　at　29　degrees　C　in　the　first　30　minutes　and　then　cooled　down　to　25　degrees　C　in　the　next　30　minutes,　after　that,　indoor　temperature　was　held　stable　in　the　final　60　minutes.　Twenty　subjects　were　recruited　to　participate　in　the　experiments.　Results　reveal　that　first,　the　temperature　of　limbs　was　lower　than　trunk　due　to　the　blood　flood　and　clothing　resistance,　second,　skin　temperature　and　Thermal　Sensation　Vote(TSV)　may　still　be　in　the　dynamic　change　after　the　ambient　temperature　reached　stable,　third,　significant　linear　correlation　was　found　between　skin　temperature　and　TSV　in　the　limbs,　moreover,　individual　difference　could　be　found　in　local　skin　temperature.