Tien-mu area is one of the most prosperous areas of suburban Taipei City, but it also faces some of the most serious social problems. The recidences of the Tien-mu area need to establish a community development association in order to fulfill the needs of the people of the Tien-mu area and to promote the further prosperity of area. The purpose of this study is to findout their needs and the roles of a community development association of the Tien-mu area. Two types of questionnaire were designed to ask the opinion leaders of that area and the also asked ordinary residents 50 opinion leaders were interviewed with in-depth questionnaire and 200 residents were interviewed to identity their needs. The major finding of this study follows: 1.There is a great need to establish an active community development association in the Tien-mu area. 2.The most serious social problems in the Tien-mu area are traffic, crime, and social welfare problems. 3.The active roles of the community development association of the Tien-mu area are based on effective leadership, sufficient funding, government and professional support. 4.Residents high participation becomes the most influential factor to the future development of the Tien-mu community development association and also of the Tien-mu area.