This paper proposes an approach for scenario-driven Web services behavior manipulation. First, the study uses UML sequence diagrams as the scenario-based specification to describe user’s requirement on the behavior of the service and construct BPEL-Petri nets model (BPN model for short) to represent the service behavior based on its BPEL specification. Second, the service behavior is analyzed based on paths of the BPN model by utilizing the notion of concurrent transitions. The set of behavior with occurrence of the scenario depicted by the UML Sequence Diagram is obtained by traversing the BPN model. Finally, by using the result of behavior analysis, the study constructs the manipulator services to extract or filter out the behavior at run-time by listening to, checking, and filtering the messages exchanged between the user and the target service. In addition, the study has developed a prototype tool called BASIS to facilitate the behavior manipulation and conduct a case study to illustrate the feasibility of this approach.