A new method, “regional analysis” for heterogeneous catalysis, is presented in order to find quantitative correlations between the reaction rate over catalysts and either acid strength distribution over solid acids for an acid catalysis or excess oxygen distribution over oxides for an oxidation-reduction catalysis. This analysis is based on the assumption that, in the case of acid catalysis, the reaction rate on an acid site is determined solely by the acid strength of the site, without depending upon the chemical composition of catalysts as far as similar catalysts are concerned. Methods of least squares are employed to find the regional rates or regional rate constants. Oligomerization of propylene and depolymerization of paraldehyde, both on nickel sulfate calcined at various temperatures, were analyzed as examples. In the latter reaction, it was suggested that the Brönsted catalysis law may hold even in heterogeneous catalysis.