A　solar　collector　is　the　most　important　component　in　a　solar-ground　source　heat　pump　(SGSHP)　system.　The　collector　performance　affects　the　heating　load　and　the　coefficient　of　the　heat　pump.　The　heat　output　performance　of　a　solar　collector,　which　was　used　for　a　solar-ground　source　heat　pump　with　the　heating　mode,　is　predicted　in　this　article.　The　heat　pump　system　can　be　either　a　solar-energy　source　heat　pump　or　a　ground　source　heat　pump.　Valuable　numerical　results　were　obtained　in　the　experimental　study　of　a　real　SGSHP　system.