The present invention provides a relay server-based web page pre-reading and integrated browsing method and system. The method includes: based on a page visit request sent from a mobile terminal for page data of a web page having a plurality of sub-pages, requesting the page data of the web page from a network resource server; after receiving the page data of the web page from the network resource server, performing a pre-reading process starting from the received page data of the web page and ending with pre-reading page data of a predetermined levels of sub-pages of the web page from the network resource server. By using the present invention, effective sub-pages can be flexibly obtained and the obtained sub-pages can be merged and rearranged. The web page display can be more flexible, user-friendly, and fast, reducing the user's operating processes and enhancing the user experience when browsing web pages having multiple sub-pages.