This paper aims at investigating the potential of using Facebook as a web-based teaching tool at University level. The researcher has adopted the experimental, the descriptive and the analytical method via the questionnaire and the pre and posttest as tools for gathering the data concerning this study. The sample of this study composed of (24) students studied English in the second year at University of Kassala who they have Facebook accounts whereby were taught online inside Facebook group; and (50) teachers who responded to the questionnaire selected purposively from different Sudanese universities and colleges due to their experience and use of technology in teaching. The data obtained from the test and the questionnaire have been processed computationally with SPSS program to examine the correctness of the hypothesis of this study. The results from both tools have shown that there are salient potentials for using Facebook as a web-based teaching.