Strandeiland, as an expected housing project on artificial islands in Amsterdam, is hoping to ease the housing pressure as well as recover the natural identity for the IJburg district. The objective of this research is to design a reedbed filter system for the island that can circular the wastewater into freshwater. This water system set up a landscape framework regionally. Presenting as a showcase, the design focus on a reed factory that manufactures reed building materials for house construction on-site, which are the most important by-products of this reed system. This development not only strengthens the water resilience, recover the island's natural identity, but adds more extra value to the whole neighborhood.