The invention relates to an establishment method, communication method and related system of tunnels on a content network. The establishment method includes the following steps that: a first node receives and encapsulates first packet data, so as to obtain second packet data; the first node sends the second packet data to a second node; the second node de-encapsulates the second packet data so as to obtain the first packet data; and the first node and the second node establish network tunnels on the content network. The communication method includes the following steps that: a first node receives and encapsulates first packet data so as to obtain second packet data; a second node receives and encapsulates the second packet data so as to obtain the first packet data; and the second node transmits the first packet data to a second host. The communication system includes a tunnel management server, a first node and a second node. According to the establishment method, communication method and related system of the tunnels on the content network, the network tunnels are established on the content network, and network architectures of the same type can perform data communication through the content network.