Corporate governance in Taiwan is currently not widely implemented. Foreign companies often adopt the separation of management and ownership of professional management pattern, because the separation of ownership and management, leading to agency problems. In Taiwan, all listed securities of companies with multi-family business orientation, concentration of ownership in the hands of one or more families; and family members and full members of the Board and key senior managers, the internal interest structure (directors, supervisors and managers of all shareholders) holding managers approximation ratio. This paper discusses the capital structure of corporate debt to equity ratio and internal equity structure of the impact on company performance should help Taiwan business community on corporate governance implementation.