Social robots are coming to appear in our daily lives. Yet, it is not as easy as one might imagine. We developed a human-like social robot, Robovie, and studied the way to make it serve for people in public space, such as a shopping mall. On the technical side, we developed a human-tracking sensor network, which enables us to robustly identify locations of pedestrians. Given that the robot was able to understand pedestrian behaviors, we studied various human-robot interaction. We faced many of difficulties along the way. For instance, the robot failed to initiate interaction with a person, and failed to coordinate with environments, like causing a congestion around it. Toward solving these problems, we have developed various human interaction models. Such models enabled the robot to better serve individuals, and also helped us to understand people’s crowd behavior, such as congestion around the robot. I plan to talk about a couple of studies along this line, and some of the successful services provided by the social robot in the shopping mall, hoping to provide an insight about how social robots in public space will look like in the near future.