The　solar　energy-phase　change　thermal　storage-fresh　air　heating　system　was　built　to　afford　building　fresh　air　heating　load.　In　this　system,　all-glass　vacuum　tube　solar　collector　was　taken　as　system＇s　heat　source.　The　phase　change　thermal　storage　equipment　was　taken　the　core　heat　storage　component　of　this　system.　The　air-water　heat　exchanger　was　taken　as　the　system＇s　heating　end.　By　running　the　different　modes　of　the　system,　the　unstable　solar　energy　was　changed　with　the　stable　heat　source.　A　model　describing　the　transient　behavior　of　system　was　first　establishes　in　this　paper　and　the　model　was　validated　by　experiment.　Then,　based　on　this　model,　the　system　design　parameters　(collector　system　flow　rate,　quality　of　phase　change　materials,　phase　change　temperature,　etc.)　and　operating　strategies　were　investigated.