The invention discloses a virtual network system. The virtual network system comprises a first computing node and a second computing node. The first computing node includes a first virtual machine and a first routing module which are arranged in a first virtual network. The second computing node includes a second virtual machine and a second routing module which are arranged in a second virtual network. The first virtual machine is in communication connection with the second virtual machine through the first routing module. As one routing module is arranged in each computing node, the virtual machines arranged in different computing nodes can communicate without via a network node, and the network transmission efficiency of a large-scale network can be improved.