The embodiment of the invention discloses a method for determining energy consumption per unit product based on energy consumption per unit output value. The method comprises following steps: selecting sample points of a corresponding quantity in a short term according to the specifications and kinds of products; calculating a total output value according to the sale price of each kind of products and the qualified output of each kind of products; calculating total energy consumption according to energy consumption of unit output value and the total output value; building a relation equation according to an energy balance relation; substituting the total energy consumption corresponding to each sample point and the qualified output of each kind of products into the relation equation, thus obtaining an equation set; analyzing the solution space of the equation set; and calculating the energy consumption per unit product of each kind of products. According to the method for determining energy consumption per unit product based on energy consumption per unit output value provided by the embodiment of the invention, the relation expression of the energy consumption per unit output value and the energy consumption per unit product is built through the energy balance relation; through reasonable assumption, the sample points of the corresponding quantity in the short term are selected; the equation set is built; the solution space is analyzed; and the energy consumption per unit product of each kind of products is solved.