Abstract: The current anti-torpedo countermeasure systems are usually independently developed by specialized electromechanical manufacturers. The general design concept in France is discussed in this paper, which integrates ship platform, combat system, torpedo threat, countermeasure design and outside sea trials. To obtain a countermeasure system with low cost and high performance, the design concept of the Scorpene submarine includes the following three sides: (1) optimizing torpedo countermeasures based on torpedo threat characteristics and subsequent operational reactions; (2) integrating combat system and platform; (3) simulating operational reaction efficiency based on actual operational schemes. This system has already been equipped successfully on nuclear-powered submarine(SSN) and nuclear-powered ballistic missile submarine(SSBN) in France, and its up-to-date version will be recommended to Direction des Constructions Navales(DCN) conventionally-powered submarine(SSK) Scorpene class submarines. The application indicates that this system can realize anti-torpedo countermeasure with least countermeasures and lowest power consumption for evasive maneuver.