The characteristics and variation trend of the acid rain from 2006 to 2015 at Mount Tai are statistically investigated based on the pH value, conductivity, amount of precipitation, wind direction, and wind speed, and the influence of the amount of precipitation, wind direction and wind speed on the acid rain at Mount Tai are also analyzed. The results show that the annual mean pH value of precipitation ranges from 4.31 to 4.99 and the frequency of acid rain is up to 69.3% at Mount Tai. As the amount of precipitation increases, the pH value tends to reach 5.60 (neutral). A similar variation trend is observed of the monthly mean pH value and the monthly process-averaged precipitation from May to next January, while the monthly mean conductivity presents an opposite trend with the monthly process-averaged precipitation. Southwesterly winds prevail during precipitation processes at Mount Tai. The southerly and northeasterly winds bring the highest frequency of acid rain and the highest acidity at Mount Tai, which could be attributed to the wind speed and wind direction as well as the distribution of anthropogenic emission sources. In the past decade, both the precipitation acidity and the frequency of acid rain at Mount Tai tend to decline, which indicates the improvement of acid rain pollution and is of significant importance for protecting the ecological environment of Mount Tai.