Based on the observational data of total ozone mapping spectrometer from 1979-2005 and ozone monitoring instrument from 2006-2007, the regional and seasonal distribution of tropospheric ozone residue and total ozone were analyzed.The abrupt change and period characteristics of ozone in Guangzhou were analyzed by such methods as binomial weighted average, Mann-Kandall abrupt change verification and wavelet analysis.The results show that the average tropospheric ozone residue is 35.89 DU in China and that the distribution of TOR is higher in east area than in west area.The highest value appears in eastern Sichuan and western Chongqing while the lowest value appears in Tibetan Plateau.TOR reaches the peak in summer, the second peak in spring, and the value of TOR is the minimum in winter.The average total ozone is 298.61 DU in China.The TO grows with the latitude, but Tibetan Plateau is the region with the lowest TO value.TO presents the highest value in spring and the lowest value in autumn.TOR in Guangzhou took on the trend of rising during 1979 and 2007.The increase of the annual mean TOR in Guangzhou was 0.38 DU/(10 a).The abrupt change happened in 1997.TOR in Guangzhou presented obvious period of one and two years.TO in Guangzhou took on the trend of reducing during 1979 and 2007.The decrease of the annual mean TO was 2.1 DU/(10 a).The abrupt change happened in 1993.TO in Guangzhou presented obvious period of two years.