Abstract. The growth of Social potential in marketing. While users communicate and interact via SNS, the list of their conversation, which is called casual data can be used to determine their needs or aspirations. SNS can be very useful for pr especially when developing new ideas or simply evaluating the feasibility of their existing products/services. Furthermore, SNS provides a unique system that enables expressive and two known for its effectiveness in delivering fresh news and information, th be used as promotional media. Although several online services that utilize SNS and casual data have been provided, the purpose of those services is still unclear and ineffective. In those services, users were only asked for their opinions without receiving sufficient feedbacks. propose an innovative way of utilizing SNS and casual data in designing user generated design. In our proposed sy product/service development process in an interesting way. We designed an online service, which allows users to posts idea. While contributing to the product/service development benefit from expressing their hobbies and receiving feedbacks from other users.