1. A frequency spectrum allocation method, the method comprising:receiving first system throughputs, reported by servers of different operators and determined by the servers on each frequency spectrum reference unit, wherein an available frequency spectrum is divided into a number of frequency spectrum reference units; and
for each frequency spectrum reference unit, allocating the frequency spectrum reference unit to an operator with a largest value of the first system throughput according to the first system throughputs reported by the servers of the respective operators on the frequency spectrum reference unit.