Abstract: 【Purpose/significance】Owing to the discontinuity of behavior and the uncertainty of demand as far as small and micro en⁃ terprises (SMEs)' competitive intelligence is concerned, a sustainable operation service system is built from the perspective of libraryled model, precise customization, diversified collaboration, and platform operation.【Method/process】Reliant on expertise, personnel, resources and services of a library, a library-led precision customization service system for SMEs' competitive intelligence is pro⁃ posed, featuring multi-source data fusion, multi-organizational collaboration, multi-technology application, and multi-dimensional data supply. Besides, its operation strategy is optimized by introducing socialized thinking and CBMCE.【Result/conclusion】A sus⁃ tainable operation mechanism is formed by constructing the precise service system of SMEs' competitive intelligence and optimizing the community-based operation strategy.【Innovation/limitation】With emphasis on the leading role of libraries in the precise custom⁃ ization of competitive intelligence for SMEs, and the significance of community-based operations.