This paper addresses the important issues related to content delivery and service aggregation. We present a metadata-based approach for content and service combined delivery through IP Multimedia Subsystem (IMS). In our approach, the CAM4Home metadata model is adopted to enable a novel way of content provisioning by aggregating semantic-coherent content and service. Multimedia contents and related services are described as Collaborative Aggregated Multimedia (CAM) objects and aggregated into a CAM bundle for collaborative delivery. To apply this network-independent metadata model into the IMS architecture, we introduce a new entity named Multimedia Service Management (MSM) that is responsible for metadata processing and decision making. An example of multimedia broadcasting is given to demonstrate the proposed approach. Finally, we validate the novel approach through a prototyping system