Rational selection of fracturing fluid system was crucial to the success of fracturing operation. The selection of artificial experience could not guarantee the rationality and objectivity of the selection result, which could easily pose a negative impact on the fracturing operation effect. Considering the friction resistance performance, sand carrying performance and reservoir protection performance of the fracturing fluid, a comprehensive evaluation system was proposed based on 9 evaluation indicators such as the apparent viscosity of the base fluid, cross-linking time and filtration coefficient. The weight of each factor in the selection of the fracturing fluid was obtained using the Analytic Hierarchy Process. On this basis, a quantitative evaluation method of the fracturing fluid system was formed by using the fuzzy matter-element method. This method was successfully applied to guide the selection of fracturing fluid system for 7 wells such as Bohai X1, which helped the production of X1 well to reach 1.5~1.8 times of the allocated production. It successfully proved the rationality and reliability of this selection method, which is expected to be popularized and applied in Bohai oilfield and other oilfields.