Submerged buoys are important equipment for long-term underwater fixed-point marine environment observation. Glass instrument cabins,with their excellent pressure resistance,wave penetration,and corrosion resistance properties,are widely used in the design of submerged buoys. In this article,an overall structure of a submerged buoy based on a single glass instrument cabin is designed,the buoyancy and diving speed of the submerged buoy are analyzed,a simple and reliable parallel fuse release device is introduced,and a reliable recovery process is proposed. The submerged buoy can also be equipped with different mooring systems to become an anchored buoy or a bottom-seated buoy to adapt to different usage purposes and marine environments,and has certain promotional value.