[Purpose/significance] Multimedia resources are an important part of the construction of library literature resources, but lacking of effective management methods. In order to solve the current problems of collecting, sorting and serving multimedia resources, and further excavate the potential value of multimedia resources, it is urgent to improve the library's information management capabilities of multimedia resources, and build a multimedia service platform that can meet the demand of readers and readers' participation. [Method/process] This paper applied documents research and empirical study to analyze the current shortages of multimedia resource construction in domestic and foreign libraries. Based on the needs of the libraries and readers, it is proposed that the libraries must build a multimedia resource management system MRMS, and put forward the system architecture and functions by practice. [Result/conclusion] This paper adopt the "+ collection" system of Chongqing University Library as an example, It Verified that the MRMS system should not only support libraries to integrate multimedia resources and digital special collection resources, fully realize the digital management and utilization of multimedia resources, It also provide readers with multiple access methods based on online PC, APP and small program, and advocate readers to upload multimedia resources by themselves. At the same time, the online service platform is combined with the offline sound library, with diversified service ways and novel service methods to improve the utilization of multimedia resources.