A time-domain beamforming method based on microphone array measurements is applied to identify the location of the rotating sound source. The identification process of the beamforming method is briefly described first. And then, numerical simulations of two rotating monopole sources generating different signals at a constant angular frequency are investigated to testify the feasibility of the time-domain beamforming method. The simulation results demonstrate that this beamforming method can identify the locations of these two rotating sources very well. Finally, an experiment of a rotating disk with two small speakers is carried out to further show the identification ability of the beamforming method. The experimental results demonstrate that this beamforming method is effective in identifying the location of rotating source.