Method and system for transmitting big accessory

The invention discloses a method and a system for transmitting big accessory in multi-media information service business, wherein the method comprises separating big accessories which are to transmit into a plurality of small accessories by a first device, leading a plurality of small accessories to respectively form a plurality of MMS data packets comprising identification information, transmitting a plurality of MMS data packets, receiving MMS data packets by the multi-media information center, assuring to receive whole MMS data packets according to identification information, sending multi-media message notice, receiving multi-media message notice by a second device, noticing to download a plurality of MMS data packets from the multi-media message center according to multi-media notice, and deacidizing the whole MMS data packets to a big accessory according to identification information. The invention achieves the transmission of big accessories of MMS under the premise of alternating an existing MMS system as small as possible, thereby breaking through the limitation of an existing MMS system to the accessory volume of MMS.