The invention concerns the structure of a "SUBMERGED UNDERWATER OBSERVATION BOOTH", including a floating station on water surface, and a piping system to convey fresh air and power into the SUBMERGED BOOTH. The SUBMERGED BOOTH provides an atmospheric environment with all the necessary equipment and facilities to a person doing underwater observation or research. The SUBMERGED BOOTH can travel underwater in both vertical and horizontal directions. The SUBMERGED BOOTH is designed either in the shape of a cylinder with two half-spheres at both ends, or in the shape of a sphere, with clear plastic wall all around, to provide the observer with maximum viewing angle. The invention aims to provide a system for a wide application area and many purposes of use under water such as: exploration, tourist, research, maintenance, repair, etc. . . .