This paper explores how a region in a developing country can trigger and strengthen the positive impacts of the Internet on farmers’ income, using the case of flower and tree industry cluster in Shuyang County, Jiangsu Province, China. It finds that the combination of macro-level Internet popularization, micro-level Internet use, and local endowment conditions triggers the effect of the Internet on increasing farmers’ income. The case also shows that the continuous enhancement of this effect is essentially because internal supply can adapt to the continuous online migration of external demand and make creative adjustments, thereby achieving the cumulative fit of internal supply and external demand. This study can provide empirical evidence from China for the digital dividend issue in rural areas of developing countries, and provide a reference for developing countries to promote the role of the Internet in empowering farmers and increasing their incomes.