As internet technology develops, we transfer more and more physical activities into cyberspace. On the other hand, mobile technology frees the location of cyberspace participants, and therefore, the situation and context of an avatar come back to the physical space which not only plays a role of computing interface but also provides physical social interaction and contextual experience. The emerging of locative media in urban space focuses on placing media at a location and in advance, it is often designed, planned, discussed, experienced, and modified forward and backward. Due to the complicated and time-consuming procedure of locative media planning, this paper proposes a collaborative workspace to support tangible, participative, and collaborative design by linking physical location and workspace simultaneously.