The purpose of this research is to propose the valley eco management analysis model which targets environmental resources of Shimanto River basin maintains the effect that the forest has for the next generation from the viewpoint of “Environment”, “Forestry”, and “Local revitalization”, and environment management system which pays attention to the wood biomass power-generation activities and maintains a public interest function of the forest and coexists thinning of a forest, biomass power generation cost, and local populace's needs.