The aims of this qualitative research were 1) To examine the life experiences and works of Yijing. 2) To examine the Buddhist Sangha life in the seventh century based on the analytical study of the Yijing’s records in the book of A Record of the Inner Law Sent Home from the South Seas《南海寄歸內法傳》3) To discuss the changes or problems about Buddhist Sangha life based on Yijing’s records. It was found that 1) Yijing is an eminent monk who had spent twenty-five years for pilgrimage study in Indian and Malay Archipelago in the seventh century, his works are the valuable sources of Buddhist research and some other subjects.2) Compared with the Pāli Vinaya of Bhikkhu Yijing’s records of Buddhist Sangha life were mainly about Pācittiya and Sekhiyā, most of his records are consistent with the relevant records in Vinayapiṭaka. 3) Sometimes the Buddhist disciplines have to be adjusted according to different cultures, customs or the different school’s tradition. These reasons can result in changes or problems of the relevant disciplines. This dissertation not only makes up for the partial blank of the data about the Buddhist Sangha life but also provides a new way of Buddhist research through the analytical study between the whole records of the subject book and different Buddhist Vinaya scriptures. Meanwhile, it is also a good attempt of the academic exchange between Mahāyāna Buddhism and Theravāda Buddhism.