Abstract: Ship team cooperative detection system is able to significantly improve situational awareness capability, and plays an important role in supporting cooperative command and fire strike of ship team.In the paper, definition of ship cooperative detection is depicted in three aspects of track level cooperation, plot level cooperation and signal level cooperation, and related cooperative detection system of the three levels are introduced. Cooperative detection technologies such as plot cooperation technology, resource management technology, modeling & simulation technology, test & evaluation technology etc.are analyzed. Finally, Development trends of cooperative detection system for ship team are presented in the aspects of diversification of cooperative detection equipment frequency and system, expansion of cooperation space, cooperation level to signal level, intelligentization of cooperative processing.