: A comparative study of address terms in Chinese and Thai language systems consist of kinship terms ,social addressing terms along with the use of address terms, and the factors influencing the use of address terms. The outcome of this research will not only be useful for people who are interested in Thai-Chinese language studies but also for Chinese-Thai or Thai-Chinese translators who are in need of clear translation means against a general background of language, culture, belief, politics, and religion. In our conclusion, we found that sex, age and relationship are the three main factors that influence both Thai and Chinese addressing terms. Moreover, the address terms for groups of kinship, with their respective pronouns, share the same natural characteristics as other languages in Southeast Asia, for example Vietnamese Laos Cambodian Burmese.