Abstract: Water resource value is the foundation of water resource continuous utilization.The traditi onal water conservancy project economy a ssessment was manacled by the idea of "water resource are taken unexhausted and expensed unexhausted",so there was a complete lack of taking into account water resource itself value,brought the water conservancy project economic assessment into a fuzzy result or a feasibility conclusion with deviation.This text brings water res ource themselves value into the water conserv ancy project economy appraise in two asp ects:the influences of water resource value on supply-requirement contradiction at waters upply area and water conserv ancy project economy benefits,the result declares that consideration or no consid eration water resource themselves value can bring into tremendous influence on a nalytical results,even may-be bring opposite conclusion comparison with intrinsic conclusion.