Displacement　ventilation　(DV)　system　is　an　energy-saving　strategy　for　buildings　with　large-space　layout.　However,　the　application　of　this　system　to　the　relic　preservation　area　in　archaeology　museum　is　facing　challenges　since　there　no　internal　heat　sources　existed　in　the　occupied　area.　The　primary　factors　that　affect　the　thermal　stratification　would　be　the　arrangement　of　the　supply　air　outlet　and　supplied　air　parameters.　In　this　research,　three　experimental　tests　were　carried　out　to　evaluate　the　influence　of　the　supply　air　outlet　on　the　system　performance.　The　experimental　results　show　that　the　vertical　distribution　of　the　supply　air　outlet　has　a　negligible　effect　on　the　temperature　and　relative　humidity　(RH)　environment　parameters　in　the　inner　area　of　the　burial　pit,　but　has　a　great　influence　on　the　upper　region.　That　is　to　say,　for　the　area　with　slightly　higher　cultural　relic,　the　location　of　the　supply　air　outlet　should　not　be　too　low.　©　Springer　Nature　Singapore　Pte　Ltd　2020.