Technological alliance of enterprise is an organization of technology innovation. The proper selection of corporate governance of technological alliance can provide advantage with cost-down, and also it is the decisive factor of success for technological alliance. Based on the comparatively research of the diversity in the structure of corporate ownership and organization, control right distribution, relationship of partners, etc, this paper indicates that the corporate governance of technological alliance is cooperation relationship of the knowledge capital, which makes the base of partner's capability and sharing the control right. The corporate governance of technological alliance is compound of negotiation mechanism, reputation mechanism and trust mechanism. Further analysis of them is also provided.