Today, the ＂Sosan＂ is ＂Yang-Ming Mountain＂, but its erea was not the same. We try to discuss the erea which was in the Japanese ruled period about its development. When the Chin Dynasty, ＂Sosan＂ was famous for grass and sulfur. But people were always afraid of sulfur, so we almost couldn't understand the reality of it. 1850's, people had cultivated here. In the Japanese ruled period, government constructed road for contralling people who were lived in this erea. Except for agriculture, the weather and environment were similar to Japanese, the Japanese government always make object to let it be liked Japanese more and more. And schools also hold activities to practice students had Japanese spirit. 1930's, the Japanese government was effect by the WEST; they built the ＂Dai-Ton Kokuritsu Kouen＂(Dai-Tun National Park) here to propagandize the success in Japanese ruled. After War II, the political meaning of ＂Sosan＂ was changed from Japanese to Chinese. The ＂Tsau Shan(Sosan) Administration ＂ was established just like the ＂Lu Shan Administration ＂ in Mainland China. And the name also had changed to ＂Yang-Ming Mountain＂ tomemorize the philosopher ＂Wang Yang-Ming＂. When Chiang Kai-Shek came to Taiwan, he has lived here for few years. The organizations ＂Chung-Shan Building＂ and ＂Research Institute of revolution and practice＂ were here, ＂Yang-Ming Mountain＂ became another center from Office of the President. Because agriculture was declining and the voice which asked national park, ＂Yang-Ming Mountain National Park＂ was established in 1985. It continued the plan which was set in the Japanese ruled period. It was less political intervening, more environmental consciousness. ＂Yang-Ming Mountain＂ combined nature with humanity successfully; it changed traditional agriculture to exquisite agriculture.