disclosed are a method , device , and system for implementing network access , and a network system . the method comprises : in the case that a terminal requests to access a webpage , a server determining content of the webpage that the terminal requests to access ; and the server searching for a webpage , used as a reference webpage , with relevant content matching the content of the webpage , and providing information of the found reference webpage for the terminal . the present invention can enable a user terminal to obtain multiple associated access results by performing webpage access once . even though the terminal cannot for some reason access a webpage originally expected to be accessed , or content of a webpage originally expected to be accessed cannot meet a user requirement , has a bad display effect , or even cannot be displayed , other webpages with associated or same content can be provided for the terminal , so that a webpage that comprises sufficient information , has a better display effect , and is securer is provided for the terminal , thereby avoiding an additional access operation of the terminal and improving the browsing efficiency and experience of a user .