Abstract: Based on the characteristics of leisure agriculture park and emergy analysis, this paper analyzed emergy changes in Longtaishan Leisure Agriculture Park in Fujian. The paper revealed the conditions of emergy and material flow before and after reconstruction of the park. The study also analyzed material and emergy input and output, and the contribution of natural resources to social economy. The results showed that the reconstruction of the park improved the investment proportion of system organic emergy and yield rate of net emergy value. It reduced system investment ratio of emergy and also environmental loading ratio. The reconstructed park further enhanced sustainable development capacity with a high overall efficiency. Moreover, the paper laid the basis for the efficient improvement and sustainable development of leisure agriculture parks in Fujian.