An antenna pattern control system includes a wireless access point, a memory and a processor. The wireless access point includes a plurality of adjustable antennas. Different operative arrangements of the adjustable antennas correspond to a plurality of antenna pattern combinations. The memory stores a plurality of real-time indicators recorded when the adjustable antennas are operating according to these antenna pattern permutations. The processor selects candidate pattern permutations from the antenna pattern permutations according to a cluster distribution of one of the real-time indicators located in a coordinate system. The processor also selects a target pattern permutation from the candidate pattern permutations according to a cluster distribution of at least two of the other real-time indicators. The processor outputs the target pattern permutation to the wireless access point in order to control the adjustable antennas of the wireless access point according to the selected target pattern permutation.