Public science outreach in Beijing Planetarium is one of the series of astronomical popular science activities, which is part of  “under the starry sky of Belt and Road”project. The activities are  jointly organized by Beijing Institute of science and technology, Beijing Planetarium,Youth Innovation Promotion Association CAS, IAU, EA-ROAD,，and Beijing Astronomical Society. The lectures cover a wide range of topics such as astronomy, culture, science and technology, humanities, etc. It aims to provide the public with close contact with astronomy experts and opportunities to understand the cutting-edge and hot astronomical events of astronomy.