Starting from the perspectives of flood control and prevention, “Capstone 2021: The Sustainable She-Zi Island” will first investigate the current Taipei flood prevention project in the development plan of She-Zi Island and study its feasibility. Upon the investigation and study, we will further incorporate the consideration of the natural environment and the human ecology to implement full evaluation of the transportation systems of the development plan and propose our own development blueprints of She-Zi Island. This course contains not only field surveys but also practical applications of Hydrology, Hydraulic Engineering, Transportation Planning, and Urban Planning.