Robot for fetching underwater object

The invention provides a robot for fetching underwater objects. The robot includes a body structure, standing mechanisms, an air bag, a propulsion gas pipe, a steering gas pipe, a manipulator structure and an air pump on the shore. The two standing mechanisms are respectively arranged on the two ends of the body structure along the axial direction of the body structure; the air bag is arranged in the body structure; the gas inlets of the propulsion and steering gas pipes are connected with the air pump, and the gas outlets are connected to the outside of the body structure; the orientation of the gas outlet opening of the propulsion pipe parallels to the axial direction of the body structure; the orientation of the gas outlet opening of the steering pipe is arranged horizontally and perpendicular to the axial direction of the body structure; the manipulator structure is mounted on the body structure; and the air bag is connected with the air pump through the air bag pipe.