A highly stabilized fiber 3×3 coupler Michelson interferometer vibration measurement system,which employs fiber Bragg gratings to interleave two fiber Michelson interferometers that share the common interferometric-optical-path,is presented. One interferometer uses an electronic feedback loop to compensate for the low frequency drift in the phase of the interferometric signal which is resulted from environmental disturbances,while the other one uses another electronic feedback loop to track the phase variation induced by the measured vibration,and thus the amplitude measurement of the vibration and the vibration direction are measured simultaneously. The results show that the measurement system is designed to be capable of measurement vibration with frequencies ranging from 0.1 Hz to 200 Hz and the measurement sensitivity is 6 μm/V.