Instead of possessing ownership of the land, the current Legislative Yuan site is rent from Taipei City Government. In city planning, this land is marked for school rather than for governmental use. Due to the juxtaposition of old and new buildings and dispersion of facilities, this land is not effectively utilized and the congress could not reach a full operation accordingly. Furthermore, the frequent protests and demonstrations outside the congress tend to influence the surrounding stores, residence, schools, and hospitals. These events not only result in noise and deteriorate life quality, but they also consume a lot of social resource. For this reason, building a complete and permanent space for the congress is imperative and demands immediate attention. Selecting a location for the congress is a public facility issue involving policy, social, economic, and environmental aspects. Therefore, it is essential to look for an appropriate location for the congress to optimize its function. By so doing, it not only enhances the comprehensive environment of the congress and provides space and facilities for the public, but it also brings the official and political operation of the congress into full play. Through referring to the related literatures and collecting data from interviews and survey, this study conducts an extensive and detailed investigation in selecting the future site for the congress. Specifically, this study adopts the Multicriteria Scoring Methods, DAHP and GRA in an attempt to develop a model for selecting the location of congress.