The 3rd Beijing International Forum on Lunar and Deep Space Exploration (LDSE) will be held on September 19-22, 2017 in Beijing, China. It is an international conference held every two years in China, which is sponsored by the Chinese Academy of Sciences (CAS) and organized by the General Office of Lunar and Deep Space Exploration, CAS. The main themes for this conference are the frontiers of lunar and planetary sciences, the new technologies of payloads in planetary exploration (including the Moon, Mars and asteroids and comets, and other planets), and the scientific vision of planetary exploration in future missions. The LDSE will bring together international specialists from all over the world to talk about their latest research in planetary science and deep space exploration technologies.