$\phi$ Meson Measurements at Forward/Backward Rapidity at RHIC with PHENIX Detector

Given the relatively small hadronic interaction cross section, $\phi$ meson production provide a unique and complimentary method for exploring the hot and dense medium properties created in the relativistic heavy ion collisions. In this talk, a summary of the $\phi$ measurements at forward and backward rapidities in p+p, d+Au, Cu+Au collisions in the PHENIX experiment at RHIC will be given.