The natural resources are very limited in Taiwan. Therefore, using agro-forestry recycled materials such as wood-based or non-wood fiber to make high value-added products is one of the urgent issues. Using recycled materials can not be only gain more income, but can also reduce pollution impact on the environment. In addition, on the field of circular economy, we are able to establish product design capabilities for the by-product of agro-forestry materials. And understand the recycling and processing methods of agro-forestry by-product, which will achieve the goals of energy saving and carbon reduction. This course aims at introducing special processing techniques of agro-forestry by-product developed currently, green materials, green materials technology, quality materials, diversified green materials application design, waste reduction and resource utilization. Besides, students could learn how to retrieve patents and analyze the development status of circular economy technology in the Global Patent Search System and use patent application to protect innovative technology.