On behalf of the symposium organizing committee, we like to invite experts to the 5th ISOPE Renewable Energy & Environment Symposium. In response to growing attention to green energy and growing sessions on offshore wind, wave, tidal, biomass energy and environment at the ISOPE conferences, ISOPE continues building a framework to expand these sessions and network by holding a full symposium. The 5th Symposium is being organized through collaboration of efforts among university, research organization and industry.