This paper summarized the results of “study on the role of Epstein Barr virus playing in nasopharyngeal carcinogenesis”, in which the author has taken part The results included 4 parts, namely, ① relationship between EB virus infection and nasopharyngeal carcinogenesis, ② correlation of EB virus serology with nasopharyngeal carcinogenesis, ③ the role of EB virus playing in EB virus associated neoplasms other than nasopharyngeal carcinoma, ④ the role of EB virus encoded products playing in nasopharyngeal carcinogensis This paper emphasizes the following viewpoints: ① the EB virus initially infects the dysplastic epithelial cells and might be an early event developed in nasopharyngeal carcinogenesis, ② the EB virus encoded LMP1 could play a critical role in nasopharyngeal carcinogenesis, ③ the serological diagnosis of nasopharyngeal carcinoma might become more efficient while using more than 2 kinds of antidody tests againt EB virus