the basis for mutual investigations with the scientists of the United States, Canada, England, Germany, Italy, Switzerland, Belarus, Sweden, Norway, Finland, Japan, China, Korea, Mongolia. In 1992 there has been founded Siberian international center of ecological investigations of boreal forests which favours the participation of employees in foreign grants, projects, programs including the problems of climate changes, atmosphere gas composition and biodiversity. In different landscape-ecological conditions on the territory of Siberia a net of basic research points (stationaries) to carry out experimental work and durable monitoring of forest ecosystems function was created. Availability of experts of various profiles at the Institute makes it possible to estimate scientific and applied forest problems. So, in the 1960s a complex research of mountain Siberian pine forests of Siberia was finished by development of “Instructions” on forest management in them. In it for the first time the primary significance of forestforming functions of this forest formation and their hydrology role in particular was stressed. In the activities of the Institute a great place is taken by investigations in the forests of Lake Baikal started on the initiative of academician A.B.Zhukov yet in the early 1970s. The developed approaches regulate exploitation of the region forests. They scientifically ground the monitoring of forest exploitation. It is proved by the regional evaluation scale of reforestation evaluation, by the landscape approach to location of wood-cutting areas and by rating of the technogenic load on the ground. This provides the level of ecological security corresponding to the legislation of the Russian Federation on Lake Baikal protection and UNESCO requirements to the objects of world heritage. For a number of years the Institute has been developing application methods of information coming from flying vehicles (planes, satellites) to estimate condition of forest cover of taiga zone under the impact of anthropogenic and natural factors. Under the leadership of academician A.S. Isayev in 1970-1980 there was worked out a system of aerospace information analysis. It includes etalon polygons on which on-ground and remote information was compared. Forest territories were differentiation on natural basis, experimental research of interaction of electromagnetic radiations with typical forest vegetation was made. Real expression of these investigations became a thematic cartography of resourcefully perspective single regions, compilation of forest fund maps. Recently Continuation of this work nowadays is the development of the technique of woodstand taxation and morphology structure investigation on the basis of laser, digital photo and