In response to the lack of an accurate and comprehensive understanding of the specific use of energy and the benefits it generates by beer producers in the brewing industry. Causes the difficult problem of energy loss and waste in the production process，For the first time, an energy efficiency evaluation index system was constructed based on the seven factors affecting energy efficiency in breweries; using this index system and the quantitative evaluation model, the seven primary indices affecting energy efficiency can be ranked, and the superior links can be found to continue to build on and the weak links to be rectified. Combining the actual monitoring data of a brewery over a period of time with the scores scored by on-site experts, and the proposed scheme was simulated and experimented by Python. The results show that the assessment results are consistent with the actual situation of the enterprise and prove the effectiveness and feasibility of this energy efficiency assessment index system.