The problem of marine invasive species (MIS) is one of the major threats to marine biological diversity at present. However, there is still insufficient information about MIS at both national and international levels. With the aim of exchanging information on MIS problems and exchanging experience on the prevention and control of MIS, the Regional Workshop on Marine Invasive Species (MIS) Problems in Northwest Pacific Region was held in Qingdao, China during 23–24 October 2012. About 20 prominent experts were invited from 17 organisations and more than 20 local researchers in Qingdao City. During the workshop, participants discussed about current situation of MIS problems in NOWPAP member states, impacts of the MIS on ecosystems and environment in NOWPAP member countries, and current policies and measures on preventing and controlling MIS problems in the NOWPAP member states and future needs for policies, measures and regional cooperation. Finally, they made recommendations on several areas, which include regional cooperation, reliable research and study, prevention measures, among others.