After the independences, some West African countries opted to unite within the framework of regional integration to face the multiple problems of their development. It is in this perspective that the West African Economic and Monetary Union (WAEMU) has been created in 1994. However, despite the creation of this Union, the Member States of the Union meet some difficulties in the implementation of their regional integration policy, the objective of which is to promote their development. Then they opted for the adoption of a Community territorial Planning Policy (PATC) in 2004. Thus, this theoretical research aims to study the foundations of the WAEMU community territorial planning policy. The study reveals that this Community policy is essentially based on factors linked to the evolution of the organization of the regional space, the missions of the Union, the weaknesses of national territorial planning policies and the need community solidarity.