Service collaboration is important in ServiceOriented Architecture (SOA). While service collaboration protocols for data exchange are well explored, the Dynamic Process Collaboration (DPC) is still a challenge. DPC requires not only exchanging meaningful information between collaboration parties, but also performing collaboration workflow matching based on collaboration ontology. To do this, DPC needs service collaboration ontology modeling, service collaboration discovery and establishment based on collaboration ontology and runtime recomposition capability. This paper presents an Ontology-based Dynamic Process Collaboration (ODPC) framework with these features to facilitate DPC.