Abstract: 【Purpose/significance】The multiple characteristics of the data story make public digital culture form a rich information block, promote the development and deepening of user cognition, and help achieve the goal of balanced and accessible public digital culture construction.【Method/process】Integrating Piaget's schema theory and information processing theory，this paper explores the internal mechanism of the user cognitive process of public digital cultural services under the action of data stories, clarifies cooccurrence relationship of public digital cultural service users' cognitive schema and meaning construction process , and constructs the cognitive schema model by using system dynamics.【Result/conclusion】The model provides new ideas for the government and pub⁃ lic digital cultural service institutions to solve the multiple cognitive barriers of users, improve the service level, optimize the design of public digital cultural service systems, enrich the practical application of data storytelling, and promote the transformation of users from data insight to data actions【. Innovation/limitation】The research uses schema theory to construct a user cognitive schema model to reveal the user cognitive process of public digital cultural services, but the model has not been empirically tested.