ROAD meta-architecture guides the whole enterprise architecture development process through business architecture, which is a set of simple, clear, and efficient model representations. To solve insufficient ability of IDEF0, which is used in the business activity model of an existing meta-architecture system to describe rich activity trigger sequence and information interaction scene between multi-component systems, a scenario model based on ROAD meta-architecture was proposed. This model was fused with the original IDEF0 based activity model to become a scenario-oriented activity model possessing the ability of hierarchical description and scenario-oriented sequential description. The extended ROADS meta-architecture retains the integrity and flexibility of the original architecture and complements the scenario-oriented system modeling capability to realize scenario management in business architecture design. Finally, a scenario-based foreign language teaching system was taken as an example, and a scenario-based business architecture model group was built by the ROADS meta-architecture approach and discussed. It also provides a scenario-oriented extension idea for the existing architecture.