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The 8-hydroxyquinoline was used as a analysis reagent in spectrophotometric study. It could complex with many transition metal ions, such as aluminium, iron, copper and nickel. Here, the SERS spectra of 8-hydroxyquinoline and its complex with $Al(\Pi$) and $Fe(\Pi$) were obtained. By contrast, the bands $1322,1466,1494cm-1$ were enhanced and the band $1560cm-1$ reduced in intensity for complex of I with Fe($\Pi$). The sharp bands $830,1004cm-1$ and medium intensity bands $1138,1250cm-1$ were appeared in the SERS spectra of I with $Al(\Pi )$ complex. But the intensity of bands $1358,1360cm-1$ and $1590cm-1$ assigned to v (C-C) and v (ring) vibration modes were decreased. These confirmed that, on the surface of silver colloid partiel, the gemotery of 8-hydorxyquinoline in the complex with $Fe(\Pi )$ or $Al(\Pi )$ were different. The bands $1322,1466,1494cm-1$ were assigned to characteristic bands of I with $Fe(\Pi )$ complex. The bands $830,1004cm-1$ were assigned to the marked bands of I with $Al(\Pi )$ complex. The detect limit of I with $Al(\Pi )$ and $Fe(\Pi )$ complexes could be reduced to 4ug/ml and 8ug/ml, respectively.