An Internet information transaction system with locally embedded ciphertext comprises a ciphertext input module (1), a ciphertext embedding and recording module (5), a ciphertext display mode recording module (6), a transaction condition setting module (7), a transaction management and status recording module (3), a ciphertext field identification module (2), a ciphertext display functional module (4), and a transaction evaluation module (8). A seller converts valuable text information into ciphertext on the system, and a buyer evaluates the value of the text information according to plaintext published by the seller on the system, or evaluates the information text according to comments of other buyers, so that paid sharing of the information is realized, and only fragmented key information is transacted between the two parties, which reduces transaction costs, increases the number of transactions, and ensures that benefits of the buyer and the seller are protected.