The temporal and spatial characteristics of ozone and meteorological impact factors in Suzhou were analyzed in this paper based on the ozone data of 17 air quality monitoring stations and meteorological data of 7 national meteorological observation stations from 2015 to 2019. Results showed that O₃ exceeding rate of pollution first increased and then decreased during 2015 to 2019, with the spatial distribution of O₃ exceeding rate was higher in the south (20.9%) than in the north (18.7%). The O₃ pollution synoptic type of low pressure accounted for the highest proportion with 34.3%, while the average O₃ concentration was the highest by reaching 190.0 μg·m^-3 under the synoptic type of homogeneous pressure accounted for the proportion with 18.6%. O₃ concentration increased by 15.6% on average in the whole city from 2015 to 2017, and decreased by 10.0% from 2017 to 2018, then from 2018 to 2019, O₃ concentration decreased in the north and east, with the decline rates were 4.1% and 3.1%, respectively, while in the south of the urban area increased by 6.9%. The O₃ concentration presents a bimodal monthly variation with the peaks in May and August.The diurnal variations of O₃ were unimodal. The lowest valley value was 34.4 μg·m^-3 appeared at 7 am in 2018, and the peak value was 119.3 μg·m^-3 appeared between 3 and 4 pm in 2017. The "weekend effect" was obvious during 2017 and 2019 across the city, because the meteorological conditions on weekends were more conducive to the increase of O₃ concentration.While the "weekend effect" during 2016 in the northern part of the city along Yangtze River, which was mainly related to industrial distribution and human activities. There is a significant correlation between multiple meteorological conditions and O₃ concentration. O₃ pollution frequently occurred with temperature exceeding 28℃, duration of sunshine more than 8 hours, the relative humidity below 62%, and the daily precipitation less than 10 millimetres. The variation of regional O₃ concentration is mainly affected by the transmission of different wind directions.