In this study, the development of urban space simulation system using the game engine, and by analyzing the gaze behavior of the user of the space component in this system, is intended to evaluate the urban landscape. This system was possible to reproduce the nighttime landscape together with daytime by embedding a point light source. The system can examine the landscape in real-time interaction by the buildings and urban facilities to be movable. In conclusion, we have developed the system to support the sharing of the landscape image between developers and residents and regional administration by adding a three-dimensional CAD data of the new building plan.