Abstract: 【Purpose/significance】The new phase of interdisciplinary integration and development in higher education institutions has posed new demands on the innovation of resource service systems. Restructuring a service system that aligns with these demands is crucial for optimizing collection development, enhancing service efficiency, and meeting interdisciplinary knowledge service needs. 【Method/process】Based on 190 sets of in-depth interview data collected from 22 experts in library operations and interdisciplinary academic construction, grounded theory was employed to extract the key elements for restructuring the resource service system. The In⁃ terpretive Structural Modeling (ISM) approach was then utilized to analyze the hierarchical relationships among these elements.【Re⁃ sult/conclusion】The study identified six key elements for restructuring university library resource service systems in the context of in⁃ terdisciplinary integration: information resources, physical resources, human resources, organizational resources, service content, and user needs. An innovative model for the resource service system was constructed based on these six elements, and the role of elements at each level in promoting interdisciplinary resource services was analyzed.【Innovation/limitation】The study identified and analyzed the functional pathways of restructuring elements in resource services against the backdrop of interdisciplinary integration, providing new insights for university library practices. However, the initial sample size warrants further expansion to validate the model's effec⁃ tiveness at finer-grained lower levels.