The application provide an information sending method, comprising: determining changed alarm information of an alarm, where the changed alarm information includes at least one type of alarm information, and the alarm information includes at least one of a backup status identifier of an object of the alarm, a backup object identifier of the alarm, an identifier of a change trend of the alarm, threshold information of the alarm, change information of a configured object, a monitored attribute of a managed object, a repair suggestion for the alarm, and additional content that is of the alarm and that is used to indicate an attribute of the managed object; and sending the changed alarm information to a management system.