Abstract: A beam scanning system is provided, including an antenna module and a signal processing circuit. The antenna module includes N transmitting antennas arranged along a first direction on the first plane. Each transmitting antenna extends in a second direction on the first plane and is configured to convert electrical signals into millimeter wave electromagnetic signals. N millimeter wave electromagnetic signals sent by the N transmitting antennas form a target beam. The signal processing circuit is connected with the antenna module to control the target beam to perform two-dimensional scanning by outputting a frequency and phase controllable electrical signal to each of the N transmitting antennas. The frequency and phase of the electrical signals output to the N transmitting antennas may be adjusted by the signal processing circuit when the multiple transmitting antennas in the antenna module are only arranged in one direction.