This study explores the interactions between Hsin-Chu City Government and seventy one social groups for the elderly citizen of the community during 2001-2004. The analytical framework borrows analytical theories of Ralph Kramer, Adil Najam, Stein Kuhnle, and Per Selle on interactive factors and models between the government and non-profit organization. The Results of this study demonstrate that most of the relationships between Hsin-Chu City Government and elderly welfare groups belong to cooperation and complement of integrated autonomy. The interactive relationships appear very close to each other. Again, their goals and strategies are very similar. Both of their goals are promoting elderly welfares, so it is easier for them to work together. The elderly groups do not simply accept the supplements from the city government because most senior citizens can give feedback to the society by doing social services based on their experiences, and providing manual labor. Besides, they integrate social resources and expand service efficiencies. Overall, the elderly social groups in Hsin-Chu are satisfied with their current interaction with the city government.