Abstract: By social common understanding, we mean the organic unification of the two realist forms about the selfawareness of the social main body, that is, the organic unification of the authorities' social evaluation activities and the people's social evaluation activities. During the process of transformation from the socialist core value system to the social common understanding, these two activities act and influence so mutually as to reach an agreement. The most important thing of the process lies in the identity of the whole social members with the socialist core value system. In order to realize the maximum of this transformation, it is vital to construct the correspondent social mechanism.