The article mentions the real status of using Facebook and an effect of Facebook on students learning at Can Tho University. The results showed that all students use Facebook; the average level of regularly using Facebook is 3.74; the average time of daily using Facbook is 3.04 hours. They use Facebook maily to update, follow the news from their friends and relatives. They usually use facebook in their free time and learning process. The number of students addicted to Facebook accounts for 15.1%, 75.6% students waste time on Facebook, 60.5% students affirm that using Facebook affects to their learning, makes them lack of time and neglect one's studies.