The paper addresses one of a traial for evaluation that different planning systems are suitable for sustainable regional development using a simulation game PANGAEA, which facilitates professional planners' training. The concept of “sustainable development” was proclaimed at the Earth Summit, 1992, and has been widely accepted and supported by both developing and developed countries. Although it is easy to see that we need “sustainable development” approaches, we cannot pretend that it is similarly simple and straightforward to realize sustainable development processes. As a professional planning exercise for human resource development, there are four key controlling factors to achieve sustainable regional development in PANGAEA: capacity, distribution, pace, and efficiency. Although main objective of PANGAEA is planner training, it is not ordinary result but it give us a precious hint for the future that different governmental institutions as planning systems would generate better their own public investment plans toward sustainable development by running and stock of some planner training. From the point of view of local optimization in planning function, decentralized planning system might work well for keeping balance with development and environmental preservation less failure One of a result shows decentralization was suit for sustainable development under some conditions.