To accurately evaluate the rationality of office buildings energy consumption with different use intensities, the building energy consumption software Designbuilder was used to analyze the impact of service time and personnel density on the subentry and total energy consumption of office buildings. Considering the influence of use density on subentry energy consumption, the energy consumption correction method for office buildings was optimized, which reduced the energy consumption correction value of the sample buildings with a large deviation of use intensity by 35%~45%. Using the reasonable operating energy consumption of the same type of buildings in the same climate zone as the baseline, an energy consumption evaluation method for office buildings was proposed. The new method helps to more accurately reflect the actual energy level of office buildings. The results can provide a reference for the refined evaluation of office building energy consumption.