Korean Nut-pine(Pinus koraiensis Siebold. et Zucc.) is not only native plant resources of Korea but also tree for major profits in the central cool temperate zone of Korea. At this point that productivity of planted Korean Nut-pine forest is being reduced due to the climate change and ecological transition of forest, It is important to understand the current condition of forest. In this study, forest ecosystem health was evaluated by stand structure analysis in Korean Nut-pine forest in Gapyeong county.