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For an EPC project, the design of quotas is critical. BIM technology visibility, simulation, optimization and coordination, etc, as a transformative production tool have a profound effect on construction project cost accounting process. BIM can effectively improve the reliability of construction production process cost calculation. Fuzzy analytical hierarchy method is a quantitative weight calculation method, which can effectively reduce the subjective deviation. Besides, this method can quantify the thinking and experience of experts, and have high computational accuracy. In this paper, Fuzzy analytical hierarchy method and the BIM was combined. The various professional design target was determined by FAHP method. Based on BIM, the professional design scheme of each stage was analyzed to meet the design quota target.