Elevator system for installing a load inside an aircraft compartment, comprising: - attachment means to attach the elevator system to the internal structure of the aircraft compartment, - a support having an upper surface, the support mounted on a set of wheels configured to move via a manual traction, or a set of electric motors, said electric motors being configured to be managed by a terminal; - attachment points placed on the upper surface of the support; - at least two base elements fastened to the attachment points, and configured to rotate a bar; - the bar comprising: - an upper bar comprising two ends (481, 482), where a first end comprises a first hole for receiving the attachment means, and where a second end comprises a second hole configured to receive a first or a second fitting bolt (473, 463); - at least one standard bar, comprising two ends (471, 472), a first end, and a second end comprising a third hole configured to receive a first or a second fitting bolt (473, 463), where the first end accommodates the first fitting bolt configured to screw inside the second hole of the upper bar second end, or inside the third hole of the standard bar second end; - a lower bar comprising two ends (461, 462), where a first end accommodates the second fitting bolt configured to screw inside the third or the second hole (474, 487), and where a second end comprises a through bore configured to receive a through bolt to link the bar to the base element; - and, a mount bracket to be fastened to the lateral part (122a, 122b) of the load, - wherein the lower and standard bars respectively comprises on their external surfaces a male thread (466, 476) configured to allow the rotation of the bar around the mount bracket to go up until the higher standard bar, or to go down until the lower bar depending on the direction of rotation of the bar. - attachment means to attach the elevator system to the internal structure of the aircraft compartment, - a support having an upper surface, the support mounted on a set of wheels configured to move via a manual traction, or a set of electric motors, said electric motors being configured to be managed by a terminal; - attachment points placed on the upper surface of the support; - at least two base elements fastened to the attachment points, and configured to rotate a bar; - the bar comprising: - an upper bar comprising two ends (481, 482), where a first end comprises a first hole for receiving the attachment means, and where a second end comprises a second hole configured to receive a first or a second fitting bolt (473, 463); - at least one standard bar, comprising two ends (471, 472), a first end, and a second end comprising a third hole configured to receive a first or a second fitting bolt (473, 463), where the first end accommodates the first fitting bolt configured to screw inside the second hole of the upper bar second end, or inside the third hole of the standard bar second end; - a lower bar comprising two ends (461, 462), where a first end accommodates the second fitting bolt configured to screw inside the third or the second hole (474, 487), and where a second end comprises a through bore configured to receive a through bolt to link the bar to the base element; - an upper bar comprising two ends (481, 482), where a first end comprises a first hole for receiving the attachment means, and where a second end comprises a second hole configured to receive a first or a second fitting bolt (473, 463); - at least one standard bar, comprising two ends (471, 472), a first end, and a second end comprising a third hole configured to receive a first or a second fitting bolt (473, 463), where the first end accommodates the first fitting bolt configured to screw inside the second hole of the upper bar second end, or inside the third hole of the standard bar second end; - a lower bar comprising two ends (461, 462), where a first end accommodates the second fitting bolt configured to screw inside the third or the second hole (474, 487), and where a second end comprises a through bore configured to receive a through bolt to link the bar to the base element; - and, a mount bracket to be fastened to the lateral part (122a, 122b) of the load, - wherein the lower and standard bars respectively comprises on their external surfaces a male thread (466, 476) configured to allow the rotation of the bar around the mount bracket to go up until the higher standard bar, or to go down until the lower bar depending on the direction of rotation of the bar.