The dual-line access technology of the server is in an Internet Data Center (IDC), through special technical means. Different network service providers (ISP) are connected to a server or a server cluster, so that the users accessing the network services provided by it can尽可能access with the same ISP or an ISP with faster mutual visit speed, thereby solving or alleviating the slow delay (network bottleneck) problem when cross-ISP users access the website.