We did our research work for sustainability status of Mongolian financial section on the basis of interconnection between financial soundness indicator and financial section corporate governance index. In financial soundness indicator, 40 items of International monetary fund were included and corporate index contained illustrations which can define banks development of the world. From the result view of research done at the end of 2011, it was clear that Mongolian financial section had been unsustainable. In addition evaluation model for Mongolian financial soundness was developed, having taken financial soundness indicators from the first quarter of 2000 to fourth quarter of 2011 and other macro economic variables as well as major indicators, of deposit taking institutions, including capital adequacy, non performing loan, profitability, financial leverage, liquidity, GDP growth into econometric research consideration. From the view of econometric research output, that R squared for capital adequacy is 94 % and it is 69 for performing loan, 73% for profitability, 97% for financial leverage, 64% for liquidity, 48% for GDP growth was made definite.