This project was set in the face of sea level rise which is an obvious phenomenon in nowadays caused by global warming. We tried a new way to reorganize the urban space based on multi-agent system. Swarm based algorithm is the collective behavior of decentralized, self-organized system. Each agent only interacts locally rather than globally, yet the whole system can make quick responses once the environment changes. Therefore each building can only change on a small scale while the whole city will change dramatically.