Disclosed is an electronic device including an intelligence function that reminds a user of a task to be performed, even though the user does not manually set a reminder and notifies the user whether the task has been completed. This intelligence function may be implemented in various applications, such as a reminder, a calendar, or an artificial intelligence assistant. Aspects of the disclosure may also increase business utilization of a care service. For example, the electronic device may be used to check the progress of housework of a sitter who cares for a person such as a child, an elderly parent, or a patient.