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In this paper, degradation of methylene blue in aqueous solution by combination of micro/nano bubbles (MNBs) with conventional oxidation treatment i.e. Ozone and Hydrogen Peroxide (H2O2) was examined. The treatment was performed by four experimental model using macro ozone as the control treatment. The treatment system including fine bubbles produced by (FBs) generator with power consumption of 125 watt, ozone generator (production of 400 mg/h), and hydrogen peroxide (H2O2 30%) solution with concentration 10 ppm. The samples were analyzed every 15 minutes during 2 h with turbidity meter. The results show that the potential degradation of Methylene Blue with higher residual turbidity obtained from H2O2 assisted air fine bubbles + macro ozone treatment in short time after 60 minutes of treatment. The result indicated the degradation of methylene blue finely divided into organic and inorganic matter and to be absorbed of light. On the other hand, macro ozone can degradation of methylene after 180 minutes of treatment and produce less residual turbidity. [ABSTRACT FROM AUTHOR]