The purpose of this study is to apply blue carbon, a marine resource, architecturally so that it could ultimately form a sustainable environment. Excessive fossil fuels for human development have caused serious climate change and environmental pollution. Blue carbon is a carbon absorption method using marine and coastal ecosystems, and active research is underway as a major solution for carbon neutrality. This study aims to propose an architectural space corresponding to climate change by analyzing the social necessity of blue carbon and the need for urban linkage and analyzing the way hydrophilic spaces coexist with the environment through cases.