This thesis analyses the detailed contents of "The Tibetan Book of the Dead”, "Bardo Thödol" in ancient language of Tibet, in order to redefine meditation methodology for the practices of the living. Also, the author tried to make precise reinterpretation of Bardo Thödol from the viewpoint of "ṣaḍ-aṅga-yoga", 6 accessories of yoga. During analysis and reinterpretation, Bardo was arranged in reverse order, and "ṣaḍ-aṅga-yoga” of “Maitrī-Upaniṣad” was applied as meditation methodology. In this manner, the author was able to present a new meditation methodology of ṣaḍ-aṅga-yoga, which fits every step of Bardo, and this comprehensive analysis of Bardo introduced meditation objects and prohibitive objects during meditation. A summary of this analysis came into each new tables and complete diagram after reviewing the meanings of ṣaḍ-aṅga-yoga, meditation objects and prohibitive objects during meditation.
When applying ṣaḍ-aṅga-yoga, “prāṇāyāma” was used for the choosing of the womb-door of Sidpa Bardo, and “pratyāhāra” was exercised for the closing of the door of the womb. By reviewing the application, meditation objects and prohibitive objects during meditation were fully examined. In Chönyid Bardo, I also utilized “dhyāna”, “dhāranā” and “tarka” all together so that the author could assess meditation objects and prohibitive objects during meditation. In Chikhai Bardo, “samādhi” was applied in general, “sabīja-samādhi” was employed for the stage of the secondary clear light, and “nirbīja-samādhi” was adopted for the primary clear light, which enabled the author to evaluate meditation objects and prohibitive objects during meditation.