Considering the urgent need for the construction of marine ship defense system under the new situation and the present condition about rapid development of unmanned system swarm technology as a new type of threat,a kind of defense concept and alternative solution from the aspects of the detection and interception in a setting of marine ship encountering the threat of unmanned aerial vehicle (UAV) swarms and UUV is proposed unmanned underwater vehicle swarms.In detail,different defense concepts under the circumstances of air and underwater are given from two perspectives of defense strategy which are passive defense after alarming and active defense for pre-detecting.what’s more,the relevant technologies involved in the defense concept is explained,suggestions about corresponding development and the key technologies which need to be solved are given.The conception has a positive reference value and practical significance for the future ship defense system,and provides preliminary and feasible research ideas for the future ship equipment construction.