Abstract: An approach for concurrent system modeling based on the object-oriented high-level Petri net is described. The O-O Petri net is constructed by combining object-oriented techniques with Petri net theory. The modeling of the O-O Petri net not only can reduce the complexity of the model, but also make the modeled system with reusability and easy maintainability. This approach makes O-O system modeling with the description for both formalization and graphics.As an illustration,the producer and consumer concurrent pattern is modeled using object-oriented Petri nets.The modeling experience with these nets demonstrates that the decoupling and separation of knowledge and constraints clearly enhance maintenance and reusability in concurrent system modeling.