Résumé
English for specific purpose (ESP) courses for the postgraduates in medical schools have both physical and social attributes, with emphasis to improve practical language learning of medical specialties. It's an effective way to develop the English language application ability of high-level medical college students by constructing an ESP teaching and learning ecological system with professional and social contextual characteristics. In this study, through design-based implementation research, scenario simulation class was designed and implemented to accomplish task-based language teaching and learning. Further discussions on how to integrate blended and interrelated classes, on how to define combined and interactive teachers' role were explored. Based on the teaching and learning practices, organically combining the innovative curriculum concept with the construction of ESP ecological system effectively directs the practical application of the ESP class under the perspective of learning science, and verifies the feasibility of the ecological construction of ESP curriculum system.