Due to the impact of globalization, many companies engaged in foreign direct investment to sustain the operation and to improve competitiveness. Besides China, Vietnam is now the preferred foreign investment area for Taiwan manufactures. We investigated 56 listed companies which invested in Vietnam in year 2003 to 2010 and used the binary logistic regression model to test the decision factors on the entry mode between wholly owned and joint venture. The results showed that the companies those who had highly R&D expense, more disposable cash or good performance were more likely to wholly owned the Vietnam subsidies no matter what size of the scale they were. Furthermore, there’s no significant relation between the entry mode and Vietnam subsidies’ performance.