Urumqi　is　located　in　Xinjiang　province　the　cold　climate　zone　in　China;　the　heating　period　in　winter　is　6　months.　The　local　solar　energy　is　abundant,　up　to5.4×103-5.8×103MJ/(m2.Y)　which　can　provides　advantage　condition　for　utilization　of　solar　energy.　However,　heat　supplied　by　the　solar　collector　determines　the　useful　solar　energy　proportion　for　heating　terminal.　During　the　high　solar　radiation　intensity　period,　the　choice　of　the　collector　according　to　local　climatic　conditions　and　the　utilization　of　phase　change　thermal　storage　facility　impact　the　improvement　of　solar　energy　efficiency　directly.　This　research　established　a　solar　energy-phase　change　storage-floor　radiant　heating　combine-system　in　an　office　in　Urumqi.　The　influence　on　thermal　efficiency　of　solar　collector　including　outdoor　weather　condition　(solar　radiation　intensity,　temperature,　wind　speed　etc.),　inlet　and　outlet　water　temperature,　connect　method　during　local　heating　period　and　thermal　performance　of　this　combine-system　was　developed　experimentally.　The　research　result　provides　a　reference　for　optimization　design　of　this　kind　of　system.　©　2012　ASHRAE.