This study is sought to explore the integrated structure and characteristics of the planning and implementation elements of the Grand Paris Project. As a result, the planning elements of the Grand Paris Project first began with an attempt to change the administrative structure with respect to facilitate communication and integration. Secondly, establishment of legislation for the deregulation paradigm was made. Thirdly, establishment and operation of cooperated organization was carried out to ensure diversity and professionalism. On the other hand, the implementation elements are firstly done to secure the flow of improvement and changes through revision and establishment of a new transportation network. Secondly, Grand Paris Project placed in efforts to characterize the locality and secure its identity through various open contests. Thirdly, it showed to pursue eco-friendly environment. Through these results, it could be interpreted in a way that through social integration relationship, the Grand Paris Project is ultimately pursuing to build a city environment such that individual’s life could be happier. Considering various practical problems of Seoul and other cities in South Korea, the relationship between the central and local governments, population decline, changing values and environment, the characteristics of the Grand Paris Project are significant in contribution.