This manuscript presents a new methodology to measure the behavior of banking companies. It is based on criterion that equilibrium is always on a balance sheet, and the main issues is the economic and financial significance of this equilibrium. The accounting analysis based on Edgeworth's box gets analyzes an observation by two indicators, which measure the economic and financial significance of each annual observation at same time. This characteristic allows measuring the making decision on two different criteria according to evolution of macroeconomic variables. Moreover, indeterminate values have financial and economic significances because the behavior of companies has limited on this methodology. This manuscript presents on first chapter the accounting methodology of Edgeworty's box, leter the behavior of banking companies is analyzed as qualitative as quantitative criteria to carry out the result of research on second chapter, and conclusions are referred both aspects, methodology and results of research.