Abstract: The keystone of designing ship electronic wafare (EW) system is the information integration architecture which resolves information share and integrate between radar EW, communication EW, electro-optical EW, network EW and intelligence process. The structure and QoS of data distribution service is analyzed in this paper. Then the ship EW system based on DDS technology is proposed as well as its architecture, soft system architecture and the key technology. The paper can be used to provide help on the design and integrate of ship EW system.