In mid February, the French government released the "submarine warfare strategy". Its goal is to enable the French army to have combat capability at a depth of 6000 meters underwater, form competitiveness in most sea areas around the world and safeguard France's strategic interests. This "submarine warfare strategy" analyzes the relationship between the seabed and France's strategic interests, expounds the significance of controlling the seabed to protect France's strategic interests, and puts forward the road map of measures to be taken. Among them, France's submarine strategic interests include the operational ability of the French army in the face of surveillance and interception from enemy submarines, the ability to maintain underwater facilities and the safety of marine resources. To this end, France will focus on the research and development of the following equipment and technologies: deep-sea autonomous unmanned submersible and remote-controlled submersible; Ultra low frequency acoustic transmission technology; Underwater search, monitoring and jamming technology; It can be used for diving devices 300 meters underwater. The strategy said that the seabed, as a new strategic competition field, involves not only the development of mineral resources, but also the effective control of communication lines. France has a huge exclusive economic zone and needs to take the initiative in this competitive field. In the "submarine warfare strategy", autonomous unmanned underwater vehicles and remote-controlled underwater vehicles are considered to be the core equipment for exploring and developing the deep sea. At present, the French Ministry of defense has begun to develop new autonomous unmanned underwater vehicles and remote-controlled underwater vehicles, and plans to equip the first one in 2023 for testing and evaluation. The French Ministry of defense hopes to improve the familiarity with the seabed through the use of autonomous unmanned underwater vehicles and remote-controlled underwater vehicles, and finally improve the submarine combat capability of the French army. The strategy also states that it is imperative to develop deep-sea monitoring and action capabilities. This capability is mainly reflected in two aspects: first, it can control and protect seabed resources and offshore facilities, such as transmission lines of offshore wind power generation systems, oil pipelines of drilling platforms, and optical fiber cables. Second, it can protect military and industrial secrets. The frequent crash and salvage accidents in recent years show that deep-sea exploration and recovery equipment is not only a technical problem, but also a strategic problem. The release of the "submarine warfare strategy" shows that France has recognized the important position of the seabed in the current and future strategic competition. The French army believes that with the progress of unmanned technology, following the network and space, the seabed will also face the challenge of big country competition. At present, the United States, Russia, Britain and other countries are vigorously developing technical equipment for seabed development and operations. The United States is exploring the future underwater combat mode, emphasizing the role of unmanned systems and highlighting the transformation of underwater detection mode to "sensor intensive". Russia is vigorously building special submarine forces for submarine operations and intelligence activities. In the 2021 national defense document, Britain emphasized the focus on underwater operations and said that it would develop a new type of multi mission marine monitoring ship and equip it with autonomous unmanned underwater vehicles in the next few years. In order not to fall behind in the future ocean and seabed competition, France must also improve its seabed control ability. (outlook new era)