The invention provides a device for inserting additional information into short message on a short message center. The device is connected between a message receiving unit and a message transmitting unit of the short message center, and comprises a short message identifying unit, an additional information adapting unit and a message recoding unit. The short message identifying unit identifies Forward-Mobile-Originated-Short-Message signaling message that carries the short message; when extensible bytes for carrying the additional information exist, the additional information adapting unit selects proper information, and the message recoding unit inserts as well as edits the additional information into the short message and continues to transmit the message to a receiver, so as to realize the purpose of utilizing the short message to insert advertising business.