Since　the　launch　of　China＇s　＂coal　to　electricity＂　project,　many　new　room　radiator　heating　devices　have　been　developed　in　China,　such　as　split　air　conditioning　and　water-loop　heat　pump　systems.　In　order　to　avoid　the　sense　of　blowing　brought　by　split　air　conditioners　and　overcome　the　problem　of　low　energy　efficiency　of　water-loop　heat　pump　system,　relevant　researchers　proposed　the　natural　convection　heat　exchange　system.　Although　natural　convection　system　solves　the　above　problems,　it　is　still　facing　the　problem　of　low　heat　exchange　efficiency,　complexity　of　the　system　structure　and　other　problems.　In　order　to　solve　the　above　problems,　a　heat　pump　system　with　wire-and-tube　heat　exchange　terminal　based　on　natural　convection　heat　transfer　is　proposed　and　a　set　of　prototype　is　developed.　The　system　performance,　indoor　air　temperature　distribution　and　system　start-up　characteristics　under　different　working　conditions　were　tested　in　the　psychrometric　room.　The　results　show　that　the　heat　pump　system　can　achieve　a　heating　COP　(coefficient　of　performance)　of　3.55　when　the　outdoor　temperature　is　-5　C-degrees　and　the　indoor　temperature　is　20(degrees)C　and　a　cooling　COP　of　2.83　when　the　outdoor　temperature　is　40(degrees)C　and　the　indoor　temperature　is　27(degrees)C.　The　indoor　temperature　is　uniformly　distributed,　and　the　human　body　has　better　sense　of　thermal　comfort.　These　works　provide　a　new　choice　for　the　heating　and　cooling　of　residential　buildings.