Abstract
This paper describes a basic study on the emergent design system which occurs serendipity from interaction between man and machine. Serendipity is a natural ability to make interesting or valuable discoveries unexpectedly. There is a possibility to generate new design ideas if we can utilize serendipity. Therefore, we propose the emergent design system using serendipity, and perform experiments that pro-designers and pro-engineers design chair by using this system. Additionally, we interviewed them to assess the usability of this system. As a result, we showed the possibility generating new design ideas by using the proposed system which prompts the chances of getting inspirations and unexpected discoveries by using serendipity in the process of deriving solution.