A　theoretical　analysis　of　novel　PV/T　solar　collector　is　presented　in　this　paper.　The　collector　is　made　of　vacuum　tube-PV　sandwich　and　the　heat　extraction　from　PV　panel　by　the　water　passing　through　u-shape　cooper　tube　of　the　collector　results　in　the　reduction　of　the　PV　cells＇　working　temperature.　This　also　improves　the　electrical　and　thermal　efficiencies　of　the　PV　cells.　Based　on　energy　balance　of　each　parts　of　the　vacuum-tube-PV　sandwich,　mathematical　models　are　developed　to　evaluate　the　energy　performance　of　the　PV　collector　and　analyze　its　affecting　factors.　The　simulation　results　indicate　that　the　thermal　efficiency　increases　slightly　while　the　electrical　efficiency　decreases　slightly　with　the　increasing　radiation.　Both　the　thermal　and　electrical　efficiencies　increase　by　1.4%　and　0.23%　respectively　with　every　10　kg/h　increase　in　water　mass　flow,　and　decrease　by　3.8%　and　0.6%　respectively　with　every　10　°C　increase　in　inlet　water　temperature.　©　(2012)　Trans　Tech　Publications,　Switzerland.