To control the cost of trough condenser, uniform design method was adopted to optimize its structure. Displacement and stress were considered as constraints, triangular truss’s rod sizes and the wing’s rod sizes were taken as quantitative parameters, and the initial tension of cable was set as qualitative parameter. Then, according to the optimized parameters, the three-dimensional model of trough condenser including steel types, quantity, length, quality and other information was established by BIM technology to calculate the cost of steels. The result indicates that uniform design method can be used to optimize the structure of condenser with qualitative and quantitative factors. Under the constraints, the cost of the condenser is reduced by 11.76% and the amount of steel is saved by 11.86%, which shows that the optimization is effective. The proposed method has a certain reference value for the complex optimization problems including quantitative parameters and qualitative parameters. The cost of steels according to the 3D BIM information model further proves the feasibility of the method.