We　analyzed　three　forms　of　heating　system　which　is　under　the　similar　meteorological　condition　by　testing　the　temperature　distribution　of　the　radiant　surface,　the　distribution　of　the　indoor　air　temperature　in　the　horizontal　and　vertical　directions,　the　interior　surface　temperature　of　the　non-heated　surface　of　the　room,　and　the　indoor　and　outdoor　temperature　and　humidity.　The　PMV　and　PPD　indexes　were　used　to　evaluate　the　thermal　comfort　of　laboratory　in　winter.　The　results　show　that　with　other　condition　unchanged,　the　human　body　stands　and　relaxes　and　dressed　in　winter　indoor　clothes　(clothing　thermal　resistance　for　1.2–1.5 clo),　the　new　floor　heating　room　comfortable　air　temperature　would　be　17–21 °C,　and　the　optimal　water　supply　temperature　is　recommended　to　be　40–43 °C.　©　2020,　Springer　Nature　Singapore　Pte　Ltd.