The invention relates to a local cryptograph embedded Internet information transaction system comprising a cryptograph input module, a cryptograph embedding record module, a cryptograph display mode record module, a transaction condition setting module, a transaction management and state record module, a cryptograph field identification module, a cryptograph display function module and a transaction evaluate module. A seller can encrypt valuable text information on the system, a buyer can evaluate the value of the text information according to plaintext information issued by the seller on the system, or evaluate the information text according to reviews of other buyers, thus realizing information paid sharing, and fragment key information is transacted by both parties, thus reducing transaction cost, adding transaction volume, and protecting benefit of both selling and buying parties.