An AOG antenna system is provided, and is applied to a mobile terminal, the mobile terminal comprises a 3D glass rear cover and a main board arranged at an interval opposite to the 3D glass rear cover, the AOG antenna system includes a package antenna disposed between the main board and the 3D glass rear cover and electrically connected to the main board, and a metal antenna formed on a surface ofthe 3D glass rear cover, the metal antenna corresponding to a position of the package antenna and coupled and fed by the package antenna. Compared with the related art, the AOG antenna system provided by the invention greatly reduces the influence of the 3D glass back cover on the antenna performance by arranging a metal antenna coupled with the antenna encapsulated inside the mobile terminal onthe surface of the 3D glass back cover, has high antenna radiation efficiency and small gain reduction, and ensures the communication effect.