Currently, the cross-strait financial supervision institutions entered a substantive stage, but the financial and legal institutions are not matched by the cross-strait, with which differences between the financial regulatory systems have become the most main legal barriers about the cross-strait financial supervision and cooperation. The cross-strait need to learn the principle of mutual recognition from European Union, establish the principles of the system in building cross-strait financial supervision and cooperation in order to clarify the specific system of financial supervision cooperation and eliminate the legal barriers in financial supervision cooperation.