With the increasing emphasis on the eco-friendly paradigm, the sustainability of office buildings has become more important. This study aims to investigate the design characteristics of eco-friendly buildings and explore efficient eco-friendly design solutions by analyzing cases where biomimicry technology has been applied. Buildings are analyzed using a framework consisting of six aspects: technicality, recyclability, ecology, cultural compatibility, healthiness, and social compatibility. As a result, buildings minimize environmental impact through principles such as natural ventilation, insulation, natural lighting, and recycling, showing positive effects on health and social aspects. Notably, the correlation between technicality and healthiness is high, with the indoor environment emerging as the most critical factor. Biomimicry design is expected to be a crucial solution for innovative and competitive eco-friendly building design. Therefore, it is necessary to address economic issues such as initial investment costs to establish non-standard designs emphasizing ecology. This study aims to present a direction for sustainable building design.