The study used the BCF system developed by LCBA to calculate the carbon footprint of the building's life cycle. The case was the selection of a new educational building in Taipei, the first project in Taiwan to be required by government agencies to calculate carbon emissions. In addition to the calculation of carbon footprint, the purpose of this study is to assess the extent to which BCF tools can be used to feedback design contents before construction and to review the applicability of the

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... l itself. After BCFd's life cycle carbon footprint assessment, it can be seen that the carbon footprint ratio in the use phase is as high as 80.41%, followed by 7.76% in the engineering material manufacturing phase. However, in the design feedback of BCFd, although specific material selection suggestions are proposed, the application of regulations, maintenance, durability, etc., must be discussed. Based on the actual use requirements of the owner, this study proposes a correction plan for the material selection, and the BCFd method evaluation proves that it also has the effect of reducing carbon.