In a typical office environment, employees are expected to collect information about their tasks, in the event that they must hand them over to others. This task information is usually stored in multiple business applications. In this paper, we investigated how task-related information is stored across multiple applications through an actual workflow. In addition, we address two problems encountered when collecting work information from applications. First, it is difficult to collect information that directly relates to the work unit or task unit. Second, it is unclear what type of information should be handed over at the beginning of tasks. To solve these problems, we propose a new method for acquiring work history from multiple applications. The proposed method manages the application history associated with work unit or task unit. Additionally, the proposed method manages the priorities of histories. Finally, we prove that the proposed method can effectively collect work information.