The writings of famous French novelist Antoine de Saint- Exupery being describes his life and his career as a pilot. That's where aviation and modern means of transport at the beginning of the twentieth century. It is also through his writings that tainted documentary chronicled the history of occupied France by the Germans in World War II. Has contributed to the publication of documents and real events and attended by military missions. However, before he died, wrote us a novel immortal  "The Little Prince ", which is quite different from previous writings in terms of dependence entirely on the imagination. And are almost close to science fiction to fact that the hero falls to the ground in a vague, of a small asteroid. We are trying to figure out the reason of this change  in the writings of this documentary writer to write a novel -like stories of the kids.  The controversy  still exists around whether the novel for children or for adults . , And why in this particular period . The documentary presents the researcher side in the novels of Saint Exupery and the extent of the inherent and directories of the many that prove the author 's insistence on the details of the transfer of the profession Airmail which was pioneered and subjected him and his colleagues from the incidents and adventures . The writer was concerned with a note of the outer side of the physical life. Then displays the researcher 's novel "The Little Prince " , and their fictional aspects represent the invisible side with respect to such sensations and ideas . The study concludes that the novel represented the last piece of the complete panel distinguished writer who is so intake side or the outer and inner side of the tangible and intangible and knock the whole philosophy and vision to face his man and how he lives.