本文报道了汕头市室内外环境中氡土气浓度及其子体潜能浓度。研究结果显示：本市环境天然辐射水平较高，室内外氡浓度分别为２００４、１６０５Ｂｑ／ｍ３，土气浓度分别为４１８５、３１１５Ｂｑ／ｍ３，氡子体分别为０００２５４、０００２６８ＷＬ，土气子体分别为０００３３１、０００２４５ＷＬ。汕头市居民吸入氡土气及其子体所致的年有效剂量当量为１２６ｍＳｖ，其中２２２Ｒｎ及其子体贡献了０９０３ｍＳｖ，即氡及其子体所贡献的年有效剂量当量占７５％，较接近于温带地区而高于全球正常本底地区（０９７ｍＳｖ）的水平 This paper reports the concentration of radon and its potential energy concentration in indoor and outdoor environment in Shantou City. The results show that the natural radiation level in this city is relatively high, with radon concentrations of 2004, 1605 Bq / m3 and 4185, 3115 Bq / m3 and radon as 0 0 respectively 00254,0  00268WL, rustic children were 0  00331,0  00245WL. The annual effective dose equivalent of inhalation of radon and its daughters in Shantou City was 126mSv, of which 222Rn and its daughters contributed 0903mSv, that is, the annual effective dose equivalent contributed by radon and its daughters accounted for 75% , Which is closer to the temperate zone but higher than the global normal background area (0.97mSv)