While previous studies have established the significance of CALL (Computer-Assisted Language Learning) in language education, the extent to which CALL influences language teachers' well-being and their professional development has not yet been fully understood. This echoes Dörnyei's (2018) argument that although language teachers are the most important factors in learners' success, their contributions have not been considered sufficiently. As such, this short paper presents an ongoing mixed-methods project investigating Vietnamese and Japanese language teachers' well-being and the role of CALL in the ecology of language teaching at both personal and work levels using Bronfenbrenner's (1979) ecological system framework. The primary method is the grounded theory analysis and preliminary results from Vietnamese teachers' semi-structured interviews which have shown the importance of CALL in language teachers' well-being's ecology. Also, the role of the community of practice has also emerged as an informal support in language teachers' ecological well-being system. [For the complete volume, "Intelligent CALL, Granular Systems and Learner Data: Short Papers from EUROCALL 2022 (30th, Reykjavik, Iceland, August 17-19, 2022)," see ED624779.]