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The photodegradation quality of Ag-doped CdO (CdO:Ag) thin films deposited using perfume atomizer has been reported in this paper. Ag concentration in CdO is varied as 0, 1, 2 and 3 wt%, respectively. XRD studies reveal cubic crystal structure for all the CdO:Ag thin films ruling out the presence of any secondary phases and decreased crystallite size was observed with Ag doping. CdO:Ag films surfaces are composed of cauliflower shaped grains and EDX spectra ascertains that Ag has been successfully incorporated into the CdO lattice. Optical band gap tends to increase with increase in Ag concentration. Electrical resistivity showed a decreasing trend with increase in Ag concentration. Photocatalytic tests against metanil yellow confirmed that the Ag-doped CdO films exhibit better degradation efficiency than the undoped film and an efficiency of 84.44% was realized for the 2 wt% Ag-doped CdO catalyst. The recycle tests confirmed the reusable nature of the CdO:Ag catalysts.