By　conducting　experimental　measurements　and　numerical　simulations　of　air　distribution　and　microorganism　pollutant　distribution　in　the　auditorium　and　game　area　in　a　gymnasium,　pollutant　dispersion　control　and　indoor　air　quality　improvement　methods　were　put　forward.　The　results　show　that　the　fungi　and　bacteria　concentration　levels　are　less　than　the　magnitude　of　10(3)　CFU　(colony-forming　units)　which　meets　the　requirements　of　indoor　air　quality　standard.　The　numerical　simulation　results　quantitatively　agree　with　the　experimental　data　while　some　differences　between　theoretical　data　and　experimental　data　exist　in　air　distributions.　People　number　in　gymnasium　plays　an　important　role　in　affecting　indoor　air　quality　and　the　environmental　parameters　attained　the　standard.