Abstract: By using infrared reflection spectrum analysis technique in cooperation with the emendation ways such as Dispersion,Kramers-Kronig transform and back mirror-reflection,jadeite jade and the analogous jade,amber and the artificial resin imitation amber,turquoise and the carbonate imitation turquoise,ivory and the horniness imitation ivory,imitation ancient jade,filled turquoise and filled jadeite jade on gem markets were investigated.The results show that the infrared absorption spectra due to the inner and outer vibration of hydroxyl and H₂O in opaque or transparent gems and the flex and curve vibration of complex anionic group and coordination group,are effectively examined by using the direct reflection accessory and diffuse reflection accessory of Fourier transform infrared spectrometry in the range of function and fingerprint group of medium infrared light section.The representation and identification of infrared reflection spectra of gems are analyzed primarily in the paper.