The utility model discloses an inspection device of inspection gate submerged structure aims at providing the actual state that not only can look over subsea equipment such as diversion tunnel emergency gate, and convenient operation, need not the inspection device of inspection gate submerged structure that artifical dive was looked over. It is transferred the device and includes the mounting bracket, rotates the reel that sets up on the mounting bracket, the transferring the rope and being used for driving the rotatory rotary driving actuating mechanism of reel on the reel of coiling throughhorizontal axostylus axostyle including transferring the device, and viewing device, viewing device including the lens body box body that has airtight inner chamber, set up at internal camera of lensbody box and the signal line that is connected with the camera, the one end of transferring the rope is connected with the lens body box body, the signal line is convoluteed on the reel.