World Ocean Science and Technology Conference (Hainan) will be held on 8-10 November, 2023, along with Oceanology Asia 2023 (OA 2023). The Conference gives priority to developing technologies for probing deep sea, earth and space, provides forward-looking oceanic theories, builds consensus through academic exchanges, shows equipment and devices of ocean science and technology, and cultivates a new engine for developing high-quality ocean economy, thus accelerating the open collaboration among industries, universities, research institutes and end users, developing ocean high-tech industry and key marine programs, and helping develop ocean science and technology and even the whole ocean-industry chain.