Fiber-optic vector hydrophone (FOVH), with many advantages including high sensitivity, large dynamic range, intrinsic immunity to electromagnetic interference and light weight, is becoming a hotspot of new-style vector sensors. For array applications, finite element methods and experimental results of the fiberoptical flexural disk vector hydrophone are discussed (FOVH). Two finite element analysis methods are presented to forecast the performance, fiber-layer equivalent method (FLEM) and fiber-layer division method (FLDM), then a fiber-optic flexural disk vector hydrophone is developed and related metrology aspects of measurement is demonstrated. The experimental results are presented that pressure phase sensitivity of the hydrophone is -182 dB@100 Hz~-158.5 dB@1000 Hz (ref.1 rad/μPa ) at the range from 100 Hz to 1000 Hz. The cross-sensitivity is less than -30 dB. It possesses a good directional performance.