In traditional economics,value refers to indifference human labor in commodity and acts as commodity price. This paper firstly introduced the theory of user cost. With the use of user cost approach,this paper calculates the value depreciation of chinese graphite during 2001-2011 who distributes as yearly increasing,accounts for most part of gross value of nonmetal industrial output and overpass the global balanced supply and demand in unit price. Then,based on profit maximum theory,this paper analyzed the theory of value-cost approach. This paper use cost-profit approach to calculate the reasonable quantity of graphite storage. After compound analysis,it is concluded that our country should enhance government supervision and management with strict examination and issuing of exploration and concession to maintain a balanced intergeneration graphite condition.