Air and water crossed laser acoustic technology is an important issue which receives world popular research,because exhibiting teleological research on employing laser acoustic as communication sound resource is beneficial to the development and application of marine communication.This communication technology takes the advantage that laser generates sound wave in the water and collects echo signals in the air,it comprehensively applies multiple technologies such as laser technology,acoustics and electronics,which enjoys a powerful technology advantage.It is a new crossing technology in light and sound combined detection area which makes use of an airborne platform who generates laser,produces sound wave and receives sound wave that is reflected or scattered by underwater projects,thus to detect underwater projects.It is able to satisfy battle demands in different sea areas and different battle tactics.This paper introduces principle of laser excited sound in different conditions,analyzes laser acoustic technology applied in different detecting and communicating situations,and provides some suggestions for the development and application of laser acoustic technology in accordance with existing results