The 6th International Symposium on Engineering and Applied Science (ISEAS) is an international platform for scholars, researchers and practitioners to discuss interdisciplinary research and practices in the fields of Engineering and Applied Science. 2023 ISEAS will take place from July 26 to 28, 2023 in Okinawa, Japan. Prospective authors are invited to submit research abstracts or full papers. Audiences are also welcome to join the conference for research and opinions exchanging. Along with the fast development of climate change issues, environmental awareness, and consensus in environmental sustainability, we should effort in pursuing sustainable development as well as its outlook on the future. As part of the same planet, it is the responsibility of each individual and nation to protect the global environment. Only international cooperation will provide the timely solutions and the effectiveness needed to stop the deteriorating global environment.