As the economic operational center of our country, financial system always acts as the coordinated dev elopment in public. The coordinated development of financial sy stem is a result of the deepening process of financ ial practice. It is also the transition period to adapt to the exist ing norms. In the process of continuous development and innovation, the financial system is also in constant improvemen t, keeping up with the trend. This paper uses the f uzzy mathematics, to evaluate the coordinated developmen t of the financial system from the overall developm ent of the situation, as well as the size and structure