Schematic diagram of the experimental setup. A MOT is located approximately 7.4 mm beside the cavity mode (vertical). Atoms can be conveyed into the cavity mode by an air-bearing translation stage where an ODT located. The waist of ODT is aligned with both MOT and cavity mode to ensure the successive of transport and measurement. We obtain the transmission spectra and vibration frequencies with a weak probe beam along the axis of the cavity and a single photon counting module (SPCM) applied.