Deepwater Offshore Specialty Symposium (DOSS-2013) is being organized by Harbin Engineering University (HEU). It will be held in Harbin of China from 26th to 28th July 2013 , hosted by Harbin Engineering University, which had successfully held the 1st International Symposium on Deepwater Offshore Technology in April 2006 and Deepwater Offshore Specialty Symposium (DOSS-2009) in January 2009. The purpose of the symposium is to provide a timely international forum for researchers and engineers interested in "Key Technologies in Deepwater Offshore Platform" and to promote technical cooperation at an international level. We hope that this occasion will provide an excellent opportunity for researchers and engineers to discuss technical progress and cooperation. This symposium will also invite several senior experts to give some educational short courses on deepwater floating structure analysis, riser and mooring system engineering, which will also provide a good opportunity to look into the correlative knowledge and outlook in the development of deepwater offshore technology area.