"Environmental Kuznets Curve" refers to the "inverted U" curve relationship between economic development and environmental quality, that is, with the economic development and the improvement of income level, environmental quality deteriorates first and then improves. Based on the characteristic principle of the environmental Kuznets curve, according to the economic and environmental changes of R City from 2006 to 2015. This paper focuses on the analysis of the best fitting model between the chemical oxygen demand emissions, permanganate index in surface water, sulfur dioxide emissions of air pollutants, sulfur dioxide concentration and economic development of R City. The results show that the changes of the first three factors and per capita GDP conform to the environmental Kuznets hypothesis. Although the variation rule of SO2 concentration in air to GDP per capita does not accord with the environmental Kuznets hypothesis, the SO2 concentration in air will show a downward trend.