The aim of this paper is to analyze the developmental process of Gilles Deleuze`s philosophical project. Therefore, this writing is naturally not a plane delineation that simply arranges Deleuze`s philosophy centering around his life. And also, it does not take the form of a chronicle that writes down item by item historical facts related to him along the tracks of his life. It is because we cannot seize a full hold of the vital force of his philosophical thoughts only with the connected data and materials as facts. What is the fundamental project of Deleuze`s philosophy? Here, after we look first into his quest, we will carry out our search for the road to the developmental process of his philosophical project as follow. 1) Deleuze`s first philosophical project : ontological project 2) Deleuze`s second philosophical project : epistemological project 3) Deleuze`s third philosophical project : ethical project