A mobile terminal includes a metal frame, and the metal frame includes two corners provided diagonally. The antenna system includes four SIW horn antenna arrays formed on the metal frame. The circumference side of each corner is respectively provided with two SIW horn antenna arrays arranged perpendicular to each other and one of the SIW horn antenna arrays is provided at an end of the long frame close to the connected corner, and the other SIW horn antenna array is provided at an end of the short frame close to the connected corner. The SIW horn antenna array includes multiple SIW horns. The metal frame is provided with multiple spaced through holes at positions corresponding to the SIW horns. The antenna system and the mobile terminal of the present disclosure have good overall coverage efficiency.