1. A system for piloting a drone in immersion, comprising: a drone ( 100 ) provided with shooting means ( 110 , 121 , 122 ) and a ground station ( 200 ) comprising: virtual reality glasses rendering images captured via shooting means and transmitted from the drone by wireless communication means; means ( 220 ) for detecting changes of orientation of the head of the user wearing the glasses; as well as ground graphic processing means ( 210 , 230 ) adapted to generate the rendered images, means ( 110 , 121 , 122 , 130 , 140 ) for generating on board the drone a first image, called the “viewpoint” image, and transmitting this first image to the ground graphic processing means; and means ( 151 , 130 ) provided in the drone to modify the sight axis of the “viewpoint” image in response to changes of position of the user's head detected by the detection means and transmitted to the drone via the wireless communication means ( 151 , 152 ), the system being characterized in that it further comprises: means ( 110 , 121 , 122 , 130 , 140 ) for generating on board the drone a second image, called the “bird's view” image, whose field is wider and whose angular definition is lower than those of the “viewpoint” image, and transmitting this second image to the ground graphic processing means; and in that the ground graphic processing means ( 210 , 230 ) are adapted to generate locally during a movement of the user's head, by a combination of the current “viewpoint” and “bird's eye” images (P 1 , P 2 ) present in the ground station, images to be rendered (P′ 1 -P′ 2 , P″ 1 -P″ 2 ), with outlines (CO′) adjusted as a function of the changes of position detected by the detection means.