Mt. Jumbongsan site has housed the KLTER(Korea Long Term Ecological Research) station run by Ministry of Environment and National Institute of Ecology since 2004. Mt. Jumbongsan is located between Mt. Soraksan and Mt. Bangtaesan and stretches over Gangwon-do, Baekdudaegan in the Korean Peninsula. The well-preserved old-growth hardwood forest represents the vegetation of Mt. Jumbongsan within the core of Mt. Soraksan Biosphere Reserve designated by UNESCO in 1982. Qurecus mongolica and Lindera obtusiloba are the dominant species in the tree and shrub layer, respectively. Research equipment in the site consists of a flux tower, soil respiration measuring system and a V-notch weir. The flux tower is set for measuring the flow of CO2 and the photosynthesis rate and microclimate of the canopy layer in the area, and the soil respiration measurement system for studying correlation between the amount of CO2 from soil microbes and roots of plants and the soil temperature, and lastly the V-notch weir for measuring the portion material flow running through a mountain valley and hydrological studies. Altogether, we are conducting the study of interactions among various taxa using information produced from the equipment.