The International Symposium on Atmospheric and Oceanic Sciences (SAOS 2021) will be held in Guilin, China, during June 1-3, 2021. The aim of SAOS is to provide a stage for researchers, engineers, academicians as well as industrial professionals from all over the world to present their research results and development activities in Atmospheric Sciences, Climatology, Dynamic Meteorology, Eco- hydrology, Hydrology, Limnology, Marine Science and other related topics. SAOS 2021 will be a valuable and important platform for inspiring international and interdisciplinary exchange at the forefront of Atmospheric and Oceanic Sciences.