Curriculum changes over time. In practice, it is not easy to keep a curricular system updated and to provide students with reliable course services that reflect and correspond to the evolutions of curriculum. This study is a step toward supporting a smooth curriculum evolution process with Ontology-aware Course Consulting (On2C) system through the use of Artificial Intelligent techniques to assist different stakeholders involved. Our approach contributes to a recently emerging trend for incorporating intelligent techniques in Intelligent Education System. In this paper a model of the evolutionary process has been proposed, which reflects the essential structure of curriculum for offering a better way to track the history of curriculum change. Curriculum ontology we developed serves as a fixed conceptual system to fully predict the generic components of curriculum, so this ontology can be reused in situation-dependent curriculum systems.