A page redirection method, a routing device, a terminal device and a system. The routing device receives based on a first access request sent a first access response fed back by a network server; according to a redirection determination indication, modifies a return code of the first access response and adding at least one second access address of a redirected-to page and the first access address to the first access response; and sends the first access response on which redirection processing is performed to the terminal device, so that the terminal device sends a second access request according to the modified return code, and the terminal device opens, according to a second access response returned for the second access request, the page that a user needs to access and the redirected-to page.