In the presence of hydrogen peroxide, the effects of temperature and pH to the catalytic reaction velocity of cupric -thiocyanate and the quantities of reduction products adsorbed on the D.M.E. have been studied by polarographic method. According to these experiments, the following empirical equation has been derived for the relation among temperature $T_i$, concentration of hydrogen ion $pH_i$ and adsorbed cuprous-thiocyanate in moles/$cm^2Z_{ij}$, and rate constant log$K_{ij}$ $$log;K_{ij}=frac{1}{T_i}{A(pH_j)+B}+C(pH_j)+D$$ $$Z_{ij}=frac{1}{T_i}{{alpha}(pH_j)^{frac{1}{2}}+{eta}}+{gamma}(pH_j)^{frac{1}{2}}+{delta}$$ where, A,B,C,D and {$alpha},{eta},{gamma},{delta}$ are constants. The Calculated values by both equations are well agreed with empirical values within 8% in the error.