An monitoring apparatus, when detecting an abnormality in objects to be monitored by the monitoring apparatus or an abnormal state in the monitoring apparatus, which indicates the location or contents of the abnormality or abnormal state and also indicates a method for coping with it by sound or by OSD. When an administrator pushes a security-navi button, abnormality information in the objects to be monitored and a method for coping with it are displayed as a menu on the OSD. When the administrator operates the monitoring apparatus according to the displayed menu, the cause of the abnormality and a method for overcoming it can be provided.