The purpose of this study is to propose a new approach to analyze political change, and to review the process of political change in current Indonesia. Especially, this study introduces the concept of `legitimacy` for investigating various factors to form the political power and reviews dynamic process of Indonesian political change, which is caused by legitimacy crisis. According to the result of this study, political change of indonesia since 1997 is not a linear process that political crisis is caused by economic crisis in 1997, but multi-lateral dynamic process that political change is influenced by the relations and changes of various legitimacy` factors: political, economic, Social, and cultural factors etc. Suharto`s New Order System has fallen down by multi-lateral legitimacy crisis. And current Indonesia is undergoing the new period to establish new legitimacy of political power.