This study aims to investigate the usability level of web site of a university by observing 10 participants who are required to complete 11 tasks, which have been defined by the researchers before to gather data about effectiveness, efficiency and satisfaction. System Usability Scale was used to collect data about satisfaction. The research result, completed by the 10 participations show that the tasks' average completion time is 16,1460 seconds and average success score is 93.36. In addition, most of the participants indicated that it was difficult to use the web site when mobile device is used. All the participants show a positive attitude and belief that this site helps the users about finding information about university.