Two kinds of metal-organic complex thin films Ag-TCNQ and Ag-BDCB have been prepared by the modified thermal evaporation method.transimssion electron microscopy (TEM) and ultraviolet—visible (UV—Vis) spectroscopy were applied to the study of the structures of the metal-organic complex thin films.The TEM and UV—Vis spectroscopic results show that the two kinds of thin films belong to the system of metallic clusters embedded in π-conjugated organic media.