2021 4th International Conference on Environment and Ocean Engineering (ICEOE 2021) (http://www.iceoe.org/) will be held during September 24-26, 2021 in Beijing, China. Conference Website: http://www.iceoe.org/ ICEOE 2021 Shining Points: 1. After peer reviewed by at least 2-3 experts, all the accepted papers will be published into International Conference Proceedings, which is indexed by EI Compendex, Scopus, Thomson Reuters (WoS), Inspec,et al. 2. Two Outstanding Professors has joined as Keynote Speakers. One is Prof. Gordon Huang from Faculty of Engineering and Applied Science, University of Regina, Canada. And another is Prof. Yongping Li from Beijing Normal University, China. 3. ICEOE 2020 was held as virtual conference successfully during November 19-21, 2020. Paper Publishing: After peer reviewed by at least 2-3 experts, all the accepted papers will be published into International Conference Proceedings, which is indexed by EI Compendex, Scopus, Thomson Reuters (WoS), Inspec,et al. Submission and Contact Methods Submission Methods: http://confsys.iconf.org/submission/ICEOE2021 E-mail: iceoe@ieet.ac.cn Tel: +86-28-88220101 (Chengdu)/ +86-15908122414 (Wechat) Conference Specialist: Ms. Alice Lin ICEOE 2021 can provide a platform for academic communication in Environment and Ocean Engineering. For more conference information, please visit the conference website: http://www.iceoe.org/