In　recent　years,　Ground-coupled　Heat　Pump　System　(GCHPS)　has　been　widely　used　in　residential　and　commercial　buildings.　But　so　far　there　is　neither　mature　design　guidance　nor　basic　data　for　reference　about　this　system　in　China.　In　order　to　make　this　technology　more　scientifically　and　rationally,　a　1:1　mode　double-U　tube　GSHPS　experimental　platform　used　in　a　park　management　office　building　in　Beijing　was　set　up.　And　the　experimental　data　of　this　system　was　obtained　from　November　2008　to　March　2009.　This　paper　discusses　the　main　factors　of　the　40-meter-deep　and　100-meter-deep　double-U　tube　GSHPS,　weather　condition　and　the　using　characters,　which　could　bring　great　effects　on　the　air-conditioning　load,　inlet/outlet　water　temperature　of　the　ground　heat　exchanger,　heat　pump　units　and　pumps　operation　mode　of　this　system.　Moreover,　the　preliminary　optimization　operation　strategies　of　this　system　are　given　by　the　Transient　System　Simulation　Program　(TRNSYS).　This　paper　can　also　give　references　for　the　further　study.