A monitoring apparatus is provided with a monitoring system for preventing users from committing unauthorized use by storing an audit log and video data while reducing the amount of data. The monitoring apparatus includes a MFP and a monitoring camera installed at a position from which it can capture an image of the user operating the MFP. The monitoring camera captures a video image including the user. The MFP determines whether an event occurring in response to an instruction received from the user is a specific event. If the event is the specific event, the MFP stores video data representing a video image captured by the monitoring camera during a period in which the event occurs in association with a log indicating a record of the event.