Non-contact cross-network data interaction system, two-way network transmission system and data interaction method

The invention relates to a non-contact cross-network data interaction system, a two-way network transmission system and a data interaction method. The system comprises a network transmitting terminal and a network receiving terminal, wherein the network transmitting terminal is connected with transmitting terminal equipment; the network receiving terminal is connected with receiving terminal equipment; the network transmitting terminal comprises a data receiving gateway and an encoding module; the network receiving terminal comprises a data transmitting gateway and a decoding module; when the network transmitting terminal transmits data to the network receiving terminal, the data receiving gateway receives to-be-transmitted data from an appointed data source; the encoding module encodes the received data; the encoded data are transmitted to the transmitting terminal equipment; the transmitting terminal equipment transmits the encoded data to the receiving terminal equipment; the receiving terminal equipment transmits the encoded data to the decoding module for carrying out decoding; the decoded data are transmitted to the data transmitting gateway of the network receiving terminal; and the data transmitting gateway transmits the decoded data to an appointed data receiving terminal. According to the non-contact cross-network data interaction system, the two-way network transmission system and the data interaction method, the cost is relatively low; and the operation is convenient.