An isoreticular metal-organic framework（IRMOF-3） was modified with salicylaldehyde（sal） by postsynthetic modification（PSM） method.The compound was metallated with M（acac）n（M=Mg，Zn，Pr，Ni） and the characteristics of the complex of IRMOF-3-Msal were investigated by solid-state fluorescence spectroscopy.The emission peaks of IRMOF-3-Znsal exhibited the maximum blue shifted behavior and stronger relative fluorescence intensity.The further research indicated the fluorescence variations of IRMOF-3-sal metallated with M（NO3）n were better than that with M（acac）n.