Abstract: This paper summarizes the status of marine biodiversity in aspects of heredity, species and ecosystem in Qingdao offshore area, defines the circumscription and establishes the evaluation standard of marine biodiversity safety degree. Based on economic, social and environmental data from 2005 to 2014, 22 indexes were selected to establish the degree of security evaluation system of marine biodiversity from perspectives of pressure, state and response. The results show that marine biodiversity safety degree indexes in Qingdao offshore area were 0.51962, 0.36912, 0.40251, 0.29003, 0.43150 in the past five years, and these indexes indicate a severe statement. Finally, as for the existing problems of marine biodiversity, three suggestions were put forward in standards setting, environment protecting and environmental damage accountability system establishing to provide suggestions and solutions in marine biodiversity conservation and management.