Abstract: 【Purpose/significance】Comprehensively sort out and review the research and application of smart data, think about and ana⁃ lyze the possible impact on the transformation and upgrading of document information work, and provide reference for the development of subject research.【Method/process】Through systematic combing and quantitative analysis of important relevant literature on smart data at home and abroad, the development trend and theme layout of smart data are described, and the conceptual connotation, ele⁃ ment characteristics, organizational theoretical models, technical system architecture, and typical application scenarios of smart data are in-depth expounded and analyzed【. Result/conclusion】Smart data, as an intelligent engine that is scenario-based, data-based, se⁃ mantic and knowledge-based, draws on its characteristics to propose the construction of data resources in the library, and recommends "facing the cognition and decision-making scenarios of major national complex scientific issues, and oriented "multiple scenarios in the AI field, scenarios for vertical fields, and scenarios for the whole chain of industrial innovation" to build scenario-based, profes⁃ sional, relevant and knowledge-based data knowledge resources.【Innovation/limitation】A review and analysis is conducted from the perspective of combining smart data and library data resource construction models, but the research literature may be missing, and the author's suggestions may be incomplete or even wrong.