Each political party will be changed because it is determined by its internal and external factors. The changes are ongoing at their political process and mechanism, towards their objective and gives an impact to environment both to internally and externally. The change occured on Golkar’s structures and political changes in facing national reformation movement. Research affords to describe the changes that have been going on, through external dan internal determinants, process and mechanism, as well as the objective and impact. The research object is Golkar’s structures and political interaction that changed at the Golkar party in Bandung. The research used political sociology studies, qualitative approach, and descriptive methods. Meanwhile, the techniques of collecting data used document, literature, observation, and in-depth interview with using resource triangulation. The result of research showed Golkar faces process and mechanism changes, particularly about political structures and interaction. It determined by external (national reformation movement) and internal (democracy demand) factors. It leads to objective (adapting, modernizing, democratic, and decentralization) and impacts (to the Indonesian armed forces retired members and the civil servant and also the people to make and manage new political parties). To modernize its structure and political interaction, Golkar in Bandung should be continue the commitment, consistency, and adaptation to the nation development and dynamic of the region in Bandung.