This paper proposes the network game of interactive operation as a tool of the planned decision support system in park redevelopment. It is mainly grasp to the preference characteristic of each persons and effectiveness, rationality. It is made to develop into the base which raises effectiveness and rationality by introducing a social effect and a functional factor into on a physical factor in selection of the optimal strategy. First, what kind of menu selection is carried out to each relation subject according to an investment budget scale, a maintenance achievement period, and an attribute or the intention of selection hears something. This action is recorded and it becomes the data which can analyze the preference characteristic according to an occupation, a sex, and age, the view over a budget, management, and management, etc. This game is manufactured by the first step which makes efficient examination about an intention to such people's redevelopment.
