A method of controlling a terminal, comprising: receiving, by an ancillary device, information of an unprocessed event from the terminal, wherein the information contains a type and a serial number of the unprocessed event; characterized in that, the serial number of the unprocessed event is a number of the unprocessed event of a plurality of unprocessed events received by the terminal, which either belong to a same type and are numbered consecutively or belong to different types and are numbered consecutively; the method further comprising: performing, by the ancillary device, a responsive event corresponding to the type of the unprocessed event to remind a user; wherein the responsive event is a prompt generated by the ancillary device to remind the user of the unprocessed event; in response to the unprocessed event prompted by the ancillary device not being handled by the user, receiving, by the ancillary device, a predefined input operation from the user and the ancillary device producing a tag for the unprocessed event according to the predefined input operation, wherein the tag contains the type and serial number of the unprocessed event; and sending, by the ancillary device, the tag to the terminal, so that the terminal generates a corresponding notification message according to the tag for the unprocessed event. receiving, by an ancillary device, information of an unprocessed event from the terminal, wherein the information contains a type and a serial number of the unprocessed event; characterized in that, the serial number of the unprocessed event is a number of the unprocessed event of a plurality of unprocessed events received by the terminal, which either belong to a same type and are numbered consecutively or belong to different types and are numbered consecutively; the method further comprising: performing, by the ancillary device, a responsive event corresponding to the type of the unprocessed event to remind a user; wherein the responsive event is a prompt generated by the ancillary device to remind the user of the unprocessed event; in response to the unprocessed event prompted by the ancillary device not being handled by the user, receiving, by the ancillary device, a predefined input operation from the user and the ancillary device producing a tag for the unprocessed event according to the predefined input operation, wherein the tag contains the type and serial number of the unprocessed event; and sending, by the ancillary device, the tag to the terminal, so that the terminal generates a corresponding notification message according to the tag for the unprocessed event. performing, by the ancillary device, a responsive event corresponding to the type of the unprocessed event to remind a user; wherein the responsive event is a prompt generated by the ancillary device to remind the user of the unprocessed event; in response to the unprocessed event prompted by the ancillary device not being handled by the user, receiving, by the ancillary device, a predefined input operation from the user and the ancillary device producing a tag for the unprocessed event according to the predefined input operation, wherein the tag contains the type and serial number of the unprocessed event; and sending, by the ancillary device, the tag to the terminal, so that the terminal generates a corresponding notification message according to the tag for the unprocessed event.