Provided is a marine simulator system with an upper layer and a lower layer. The ship comprises a lower-layer six-degree-of-freedom platform, an upper-layer six-degree-of-freedom platform, a set of arc-shaped displays, a set of arc-shaped display supporting frames, a circular rotating table, an overall supporting frame, a ship body, a top projection plate, a set of top projectors, an outer cover shell, a set of bottom projectors and a bottom projection plate. The ship body is located in the center of a cylindrical area defined by the set of arc-shaped displays, the top projection plate and thebottom projection plate, and the circular rotating table and the bottom projection plate are located at the same horizontal height position. The invention discloses a marine simulator system. Three space environments are arranged; the six-degree-of-freedom workbenches and the rotating platform are arranged on the upper layer and the lower layer, so that the simulated ship body can be in a left-right swinging state, the simulated ship body can be in a left-right swinging posture, the left-right swinging posture of the ship in the ocean can be simulated, the real effect of the simulator can beimproved, and the training effect on a ship driver can be improved.