Ozone (O_3) is a main factor for atmospheric pollution and climate change. It is of great significance for the prevention and control of urban air pollution. Surface O_3 variations over Taiyuan were investigated at 10 monitoring sites. The relationships with meteorological factors (visibility, barometric pressure, air temperature, air humidity, wind speed and wind direction) were analyzed. In general, the highest O_3 concentration variation occurred in summer; following with spring, and the lowest O_3 concentration variation occurred in winter. The clustering results of heat map analysis showed that the relative higher O_3 concentrations occurred in frequent human activities areas, including the traditional heavy manufacturing zones and newly downtown zones, comparing with those in the transition regions. During the whole year, the O_3 concentrations were significantly correlated with visibility, air temperature, air humidity and wind speed, respectively (n=365, p<0.001). The wavelet analysis revealed that the period structure of O_3 concentration time series was <4 days (p<0.05). In addition, the linear synchronous changes were observed in the relations with air temperature and air humidity in June and July. The approximate linear synchronous changes were observed between O_3 concentration and visibility in November. The west-north-west wind direction had the greatest impact on O_3 concentration, with annual impact frequency of 50%, especially up to 60% in summer. The west-north-west and north-north-west wind directions had similar effects on O_3 concentration in autumn, with impact frequency of 40%. In general, our analysis can promote the prevention and control of urban atmospheric pollution.