The present disclosure discloses an antenna system and a mobile terminal. The antenna system includes a first feeding point, a first millimeter-wave array antenna electrically connected to the first feeding point, a second feeding point, a second millimeter-wave array antenna electrically connected to the second feeding point, a third feeding point, a third millimeter-wave array antenna electrically connected to the third feeding point, a fourth feeding point, and a fourth millimeter-wave array antenna electrically connected to the fourth feeding point, which are all disposed on the circuit board. Beams of the first millimeter-wave array antenna cover a space of X>0. Beams of the second millimeter-wave array antenna cover a space of X 0. Beams of the fourth millimeter-wave array antenna cover a space of Y