The report from the Ministry of Laboure showed that the 54362 Vietnamese workers in 2023 working in Taiwan have left their contracts illegally to work in Taiwan. Therefore, how to maintain the employment of Vietnamese workers keep working in Taiwan. Working environment and sociocultural adaptation and reduce the negative benefits is an important issue for Vietnamese workers. This study aims to clarify the relationships among Psychological Contract Violations, Unmet expectation, Job Dissatisfaction, Social cultural of the adaption and Intention to Leave of Vietnamese migrant workers in Taiwan. The primary motive was to find those factors which are strong predictors of Intention to leave. This study using quantitative research methods to examine the relationship among variables. The sample for this study included 290 Vietnamese migrant workers who are currently working in Taiwan. The findings of this study revealed that Psychological Contract Violations have significant effect on Unmet Expectations and Job Dissatisfaction. In addition, Job Dissatisfaction has significant effect on their Intention to Leave. Furthermore, the study found that Unmet Expectation mediates the relationship between Psychological Contract Violations and Job Dissatisfaction; Sociocultural adaptation have a moderating effect on intention to leave.