The effectiveness of 3D edugames in foreign language teaching has been extensively verified through numerous studies. Their features of simulation, immersion, and visualization can significantly enhance EFL learners motivation, interest, and autonomy, thereby facilitating language acquisition. A thorough review of literature on Computer-Assisted Language Learning reveals that research on 3D edugames in foreign language learning and teaching is relatively scarce in China, while empirical studies abroad though abundant, seldom delve into the principles of task design in these games. To address this gap, the present study constructs a task design framework for 3D edugames tailored to EFL learners, based on Williss (1996) task-based language teaching (TBLT) approach. This framework encompasses three core stages: pre-task, task cycle, and language focus, and its feasibility is validated through case studies. Moreover, the study explores how the integration of edugames with metaverse-related technologies can empower intelligent education from five perspectives:social context, learner characteristics, learning conditions, learning processes, and learning outcomes. This research aims to provide new insights into the application of TBLT, offer specific methods for designing tasks in 3D educational games, and explore digital approaches for foreign language teaching practice within the realm of intelligent education.