The invention relates to a method and a system for measuring enterprise cash flows. The method comprises steps of obtaining key indexes of the enterprise cash flows in a predetermined impact prediction and quantizing the key index, wherein the key indexes comprise an enterprise external impact factor index and an enterprise internal operation decision index; using the quantized key index as an input variable or a model parameter and constructing a calculating model which comprises a fixed asset calculating sub-model and an intangible asset calculating sub-model; obtaining calculating results of the fixed asset calculating sub-model and of the intangible asset calculating sub-model, and calculating project data in a profit calculating sheet and project data in an asset and debt calculating sheet according to calculating results; and calculating values of all calculating projects in a cash flow sheet according to the project data in the profit calculating sheet and the project data in the asset and debt calculating sheet, thereby obtaining an enterprise prediction cash flow sheet. In this way, accuracy of calculation of the enterprise cash flows can be effectively improved.