Smart phone can support a variety of functions in people’s daily life. Notification is one of the basic core function of smart phone user experience. This research explored the college students' behaviors when they deal with the notification system of smart phone. In order to know the behaviors of user, this study conducted a diary study method to record the information about notification users received from the smart phone. Before the one week diary study, a pre-experiment interview was conducted, the results of interview shown that they have a negative evaluation to receive notifications (disruptive). Hierarchical linear model analyses on the diary contents suggested that the current task types had significant influence on the college students' evaluation on notification disruptive. The evaluation on the importance of notification content can predict user’s evaluate on the disruptive of notification content.