This　paper　starts　from　research　in　characteristics　of　the　direct-gain　passive　solar　house　and　presents　the　practical　significance　for　the　application　of　the　house　in　small　and　midsize　public　building.　The　concrete　methods　are　illustrated　from　location　selection,　external　form,　internal　room　arrangement,　ventilation　and　maintenance　structure　and　so　on,　which　clarify　the　application　way　of　the　direct-gain　passive　solar　house　in　the　building.　The　purpose　of　this　research　is　to　reduce　the　energy　consumption　of　the　building　itself　and　achieve　building　energy　conservation.　©　(2012)　Trans　Tech　Publications,　Switzerland.