The invention discloses an unmanned ship formation system. The unmanned ship formation system comprises a shipborne control system and a shore based control system, wherein the shipborne control system comprises a ship control host, a navigation information collection device, an anti-interference self-organizing network radio, a shipborne satellite communication terminal, and an action execution mechanism, the ship control host is electrically connected with the navigation information collection device, the anti-interference self-organizing network radio, the shipborne satellite communicationterminal, and the action execution mechanism, unmanned ship interact information through the anti-interference self-organizing network radio, the shore based control system comprises a shore based satellite communication terminal and an upper computer, the upper computer is electrically connected with the shore based satellite communication terminal, and the shipborne control system communicates with the shore based control system through a satellite. The unmanned ship formation system can keep a certain unmanned ship formation and can carry related sensors for operation, can realize operations like non-dead angle intensive search and detection in a target water body, and improves operation efficiency, shortens operation time and guarantees operation accuracy compared with traditional single-ship detection.