The emergy analysis of ecological economic system theory and approach established by H.T. Odum was applied to quantitatively analyze the optimization and logistics of the Hongyan persimmon based ecological agricultural tourism economy in Gongcheng Yao Autonomous Country of Guangxi, with the purpose of providing scientific basis for future sustainable development in the region and other less developed regions of China. Our research data indicate that in 2004 the economic input into the county′s Hongyan persimmon based “agri-tourism” economic system was 12.74×10⁵ ＄, while the output was 35.47×10⁵ ＄, with a net profit of 22.73×10⁵ ＄. Compared to pure ecological agricultural system, the composite system had an increase of 17.2% in economic input and 126% in economic output, the net profit was 4.75 times compared to the pure ecological agricultural system, and the ratio of output over input in the composite system was 2.78, as opposed to 1.44 in the pure system. After the development of ecological tourism, the environmental input of the region′s ecological agri-tourism system remained unchanged, while the economic feedback to environmental resources was 9.24×10¹⁷ sej, with an emergy output increase of 9.79×10¹⁸ sej. The net profit of the new system 4.74 times of the pure ecological agricultural system, the ratio of net emergy output was 1.94 times of the pure ecological agricultural system, and the emergy investment ratio increased 17% compared to the pure ecological agricultural system. The research data further indicates that the Hongyan persimmon based ecological agri-tourism economic system in Gongcheng is still at an early stage of development. Suggestions on its future development are discussed.