The invention is about a deep-sea solar energy diving instrument. It includes: the diving instrument body, the glider vane or solar panel, the main thruster and the vertical stable empennage; the glider vane or the solar panel are installed on the diving instrument back; the main thruster is set in the middle vertical axis of the diving instrument; it also includes the permeable shell out of the main body, which has the flotage adjusting system, the barycenter adjusting system and the pressure capsule, the velometer, the depth gauge, the sonar responder near to the head, the altimeter near to the bow and the sonar transducer near to the tail part. The solar energy is the main driving mode and the big angle gliding technology driven by the flotage is the assistant driving mode. So it has the low energy cost, long endurance time and wide work field to improve it's investigate ability in deep sea.