Using panel data covering 1 884 Chinese counties from 2000 to 2019 and considering the comprehensive demonstration policy for E-commerce in rural areas as a quasi-natural experiment supported by the government to promote the development of rural e-commerce，this study characterizes the “lucid water and lush mountains” condition in rural areas by employing satellite inversion technology to obtain data on agricultural ecological environment quality.The time-varying difference-in-differences （DID） model is used to assess the impact of rural e-commerce development on agricultural ecological environment quality，while further exploring its mechanism and heterogeneity effect.The results indicate that rural e-commerce development significantly improves the agro-ecological environment quality， demonstrating a significant “lucid water and lush mountains” effect that is sustainable over the long term.Robustness checks，including parallel trend test， placebo test，and PSM-DID test，confirm the stability of the results.Mechanism analysis presents that rural e-commerce development improves the agro-ecological environment quality by promoting green agricultural production and enhancing the degree of informatization in rural areas.Further analysis shows that the “lucid water and lush mountains” effect of rural e-commerce development is more pronounced in areas with gentle terrain，annual precipitation exceeding 200 millimeters，and non-poor counties.Therefore，the government should continue to advance the pilot policies for rural e-commerce，strengthen the branding of high-quality green agricultural product，enhance the digital literacy of agricultural producers，and formulate rural e-commerce development strategies tailored to local conditions，so as to achieve a win-win situation in terms of economic，social，and ecological benefits.