Even if the question of the existence has been addressed by many philosophers throughout history, its debate remain always open. In common usage, it is the world one is aware or conscious of through one's senses, and that persists independently in one's absence. Other definitions describe it as everything that 'is', or more simply, everything. Some define it to be everything that most people believe in. Aristotle relates the concept to causality. But what can be sustained for sure is that our World in its totality is admirable of enigmatic. A world probably infinite in time and space, a world infinitely varied in the forms they take the matter, the energy and the information in the process of their perpetual development. Our World oscillates like a pendulum between the eternal Philosophical turmoil: "TO BE or NOT TO BE and WHAT IS IT?”