sapphire are beloved as precious colored gemstones, With the continuous development of gemstone synthesis technology, there are many synthetic sapphire made by different synthetic methods on the market. Conventional gemological identification cannot simply and accurately distinguish natural sapphire from synthetic sapphire made by different synthetic methods. The thesis uses UV-Vis-NIR spectrometer to perform spectral analysis on sapphire. It is found that natural sapphire has The absorption peaks at 387 nm, 452 nm and 566 nm are absent from the synthetic sapphire synthesized by Czochralski method, flame melting method and Paulson method. Both Czochralski and flame melting sapphire have an absorption band around 600 nm; the Paulson sapphire has an absorption peak around 660 nm, and the other three types of sapphire have no such absorption peak. According to characteristic peak fitting analysis by Raman spectrum and spss one-way ANOVA analysis, it is found that there are significant differences in the full width at half maximum between natural sapphire and synthetic sapphire, the full width at half maximum of natural sapphire are greater than 10.0 cm^-1,and the full width at half maximum of three synthetic sapphires are less than 10.0 cm^-1.The full width at half maximum of the sapphire synthesized by the Paulson method is concentrated around 8 cm^-1, while the half width of the sapphire synthesized by the flame melting method is generally 8 cm^-1~10 cm^-1, and the half width of the sapphire synthesized by the Czochralski method is distributed in 6 cm^-1~8 cm^-1 range .By comparing and studying the significant differences in spectral characteristics of UV-Vis-NIR spectra and Raman spectra, it can be use to distinguish and identify between natural sapphire and sapphire synthesized by different methods in a simple, effective and non-destructive manner.