The　performance　of　a　system　combined　solar　energy,　phase　change　thermal　storage　and　fresh　air　heating　is　studied　in　this　paper.　Based　on　the　experimental　data　from　Nov　2008　to　Mar　2009,　it　is　mainly　focused　on　how　the　heat　charge　and　discharge　performance　are　influenced　by　the　inlet　temperature,　flow　velocity　of　heat　transfer　fluid　and　installing　mode　of　the　phase　change　thermal　storage　equipment,　etc.　Furthermore,　the　main　heat　charge　and　discharge　performance　of　the　phase　change　thermal　storage　equipment　are　analyzed　by　numerical　calculation　method,　which　will　provide　references　for　the　system　optimization.