The JEM-EUSO observatory on board of the International Space Station ( ISS ) is a proposed pioneering space mission devoted to the investigation of Ultra High Energy Cosmic Rays ( UHECRs ) . Looking downward at the earth ’ s atmosphere with a 60 ^ { \circ } Field of View ( FoV ) , the JEM-EUSO telescope will detect the fluorescence and Cherenkov UV emission from UHECR induced Extensive Air Showers ( EAS ) penetrating in the atmosphere.ÊThe capability of reconstructing the properties of the primary cosmic ray depends on the accurate measurement of the atmospheric conditions in the region of EAS development . The Atmospheric Monitoring system of JEM-EUSO will continuously monitor the atmosphere at the location of the EAS candidates and between the EAS and the JEM-EUSO telescope . With an UV LIDAR and an Infrared ( IR ) Camera the system will monitor the cloud cover and retrieve the cloud top altitude with an accuracy of \sim 500 m and the optical depth profile of the atmosphere with an accuracy of \Delta \tau \leq 0.15 and a resolution of 500 m.Ê In this contribution the Atmospheric Monitoring system of JEM-EUSO will be presented . After a brief description of the system , the capability to recover the cloud top height and optical depth and to reconstruct the shower profile will be shown based on satellites data and simulation studies .