Since 2001, there are 14 financial holding companies which are established in Taiwan. The financial holding company is not only a typical style, but also contents several one-man corporations as subordiaries. Therefore, this article is ready to analyze the change of shareholder's right among the corporate group relationship. It consists of two parts, which are concerned about the holding company and one-man corporation, for the sake of shareholder's right: one is corporate information issue, and the other is on the supervisory that is the main monitoring function in Taiwan's corporate law.