Constructing the concept system and model of data sovereignty will not only promote the practical application of Chinese data sovereignty, but also contribute to exporte our independent discourse system of data sovereignty to the world. Text analysis and content analysis are used to deconstruct the conceptual connotation of data sovereignty and refine the cognitive dimension. On this basis, the relationship between concepts is clarified, and the conceptual system is finally constructed and modeled. From the cognitive dimension, six concepts related to the purpose, nature, content, characteristics, types and scenarios of data sovereignty can be deduced. Within each of these concepts lie other concepts such as data protection, political sovereignty, control, absoluteness, hard data sovereignty, and data value release. The "entity-relationship-attribute" of each concept constitutes the conceptual system and model of data sovereignty. Among the concepts in the conceptual system of data sovereignty, there are correlation relations, whole-part relations and species relations; among the related concepts in the conceptual model of data sovereignty, there are one-to-many relationship and many-to-many relationship.