When　a　radiant　floor　system　is　use　for　both　heating　and　cooling,　a　primary　problem　exits　due　to　the　tube　spacing　of　floor　heat　exchanger　needed　in　summer　not　matching　that　in　winter.　To　solve　it,　this　paper　took　an　office　building　as　research　object,　a　non-uniform　tubing　floor　radiant　system　had　been　developed　to　meet　the　different　requirement　of　load　in　summer　or　winter　correspondingly,　and　provided　a　new　attempt　for　the　combination　of　radiant　heating　and　cooling.　The　field　measurement　of　a　non-uniform　tubing　radiant　floor　heating　system　had　been　carried　on,　the　rules　of　temperature　changes　of　floor　surface,　interior　surface　of　building　envelope　and　indoor　air　had　been　analyzed,　the　thermal　comfort　and　PMV　in　this　room　had　been　calculated.　The　result　of　measurement　indicates　that　the　horizontal　air　temperature　differences　are　within　±0.3°C　and　have　no　adverse　influence　on　thermal　comfort,　though　the　maximum　floor　surface　temperature　difference　shifting　from　4.2°C　to　4.7°C　with　a　non-uniform　tubing,　and　the　PMV　of　room　varied　from　-1.8　to　1.5　during　the　whole　testing　time.　The　hours　during　which　PMV　was　less　than　-1　account　for　15%　of　whole　testing　time,　happened　in　night　when　the　room　wasn＇t　in　use.　A　conclusion　can　be　drawn　that　this　system　can　satisfied　the　requirement　of　thermal　comfort　during　the　heating　period.