This study aims to reveal the application of the relationship between architectural form and the expression of the Buoyant Montessori School (BMS) Kupang building. Developing a philosophy of architectural anatomy using the fundamentals of architectural design is the initial step in the study. The study's foundation is architectural anatomy and the design principles discovered in the observation unit of the two- and three-dimensional redesigned Buoyant Montessori School (BMS) Kupang building. After investigation, an interpretation of the Buoyant Montessori School (BMS) Kupang buildings was developed. This interpretation incorporated an ideology of universal educational value as well as a monumental, formal, local expression. For stakeholders, particularly the regional government and architectural practitioners, the study's findings can be used as a reference source and enhance the architectural concept of school buildings.