Seabed vacuum pipeline sonar system and working method

The invention discloses a seabed vacuum pipeline sonar system and a working method. The seabed vacuum pipeline sonar system comprises multiple groups of sonars which are uniformly arranged along the outer wall of a seabed vacuum pipeline at intervals, a power supply cable which is mounted in the seabed vacuum pipeline and is used for providing a power supply for the sonars, and a signal transmission line which is mounted in the seabed vacuum pipeline and is used for providing communication service for the sonars; cable interfaces of the sonar are connected with a power supply cable through a first vacuum wiring terminal which is installed on a seabed vacuum pipeline in a penetrating manner; and signal interfaces of the sonar are connected with the signal transmission line through a second vacuum wiring terminal installed on the seabed vacuum pipeline in a penetrating mode. The system can realize remote signal transmission without depending on a buoy or a sea surface platform, and is high in response speed; an