The　heat　exchanging　performance　of　the　subterranean　heat　exchangers　which　are　named　energy　collectors　here　is　the　designing　foundation　of　ground　source　heat　pump　(GSHP)　systems.　An　experimental　system　which　is　including　60　kinds　of　different　energy　collectors　is　built　by　taking　into　account　many　factor.　Such　as　the　different　buried　methods,　which　includes　the　single　U-shaped　pipe,　double　U-shaped　pipe,　and　triplicate　U-shaped　pipe　subterranean　heat　exchangers;　And　the　different　material　that　energy　collectors　be　made　of　including　stainless　steel,　high　density　polyethylene　pipes,　and　crosslinked　polyethylene　pipes;　And　the　different　backfills　in　the　hole　including　concrete　backfill,　sand　backfill　with　bentonite,　and　slurry.　The　heat　transfer　performances　of　the　subterranean　heat　exchangers　are　studied　for　each　energy　well.　This　study　describes　the　experiment　process　on　which　we　have　carried　in　order　to　obtain　comparatively　accurate　data　of　the　heat　exchange　capacity,　and　supply　the　evaluation　and　comparison　of　the　different　subterranean　heat　exchangers.　The　experimental　results　were　obtained　from　November　of　2004　to　April　of　2005.　We　believe　the　water　temperature　in　energy　collectors　is　more　important　than　the　heat　transfer　performance　of　energy　collectors.