In 2050, the human population will exceed nine billion. There are limits to the capacity of the earth, while the human population keeps on growing. Our appetite for raw materials is increasing rapidly, while available resources keep on falling. As an international metropolitan city, Amsterdam will also experience a population explosion and urban expansion in the future. Resources and raw materials will be in high demanded. In addition, with the population growing, a larger amount of waste will be generated, however, the land for waste treatment will become less. In order to live on a healthy plane in the future, building a new system of managing raw materials becomes necessary and crucial. The project will be an upcycling center for waste and an urban park on the roof. Since the Petroleumhaven where my project located in will be an eco-friendly green space for the city, the composting process of the organic waste in the program will generate organics, like N,P,S, to improve the soil quality. Besides, the public function like exhibitions, educational tour and workshop also attract people to take participate in. It will be a platform for designers and citizens to share their knowledge of how to create the value of waste, and also a platform for exchanging materials. This project is trying to explore a new relationship between the waste treatment facility and the public, and also a showcase for recycling achievement.