Air　conditioning　accounts　for　40%　of　the　total　residential　electricity　usage　in　Guangzhou.　There　is　great　potential　to　reduce　building　energy　consumption,　and　energy　policy　plays　an　important　role　in　Chinese　sustainable　development.　Therefore,　in　order　to　evaluate　the　further　trend　of　residential　energy　consumption　for　air　conditioning　and　to　provide　detail　and　accurate　information　for　calculation　of　air　conditioning　energy　efficiency　in　China　standard　promotion,　it　is　necessary　to　understand　air　conditioning　usage　behavior　of　residents　in　most　typical　cities　and　areas　of　China.　In　this　paper,　occupant　behavior　and　control　of　indoor　environment　in　south　China　are　introduced　through　questionnaire　to　400　different　households　and　field　measurements　in　100　air　conditioner　families.　The　relationship　between　air　conditioner　running　time　and　outdoor　air　temperature　was　quite　different　from　curve　given　by　Chinese　air-conditioning-units　energy　efficiency　standards　GB/T　7725-2004,　but　was　most　similar　to　the　Chinese　air-conditioning-units　energy　efficiency　standards　GB21455-2008,　and　refrigeration　running　time　was　half　of　running　time　given　by　Japan＇s　energy　efficiency　standards　JRA　4046　in　the　scale　of　24C27C　outdoor　air　temperature.　©　2011　IEEE.