1. A method for updating webpage data for using in a terminal, comprising: obtaining, by the terminal, an update identifier corresponding to latest released webpage update data from a network server, wherein the webpage update data is used to update current webpage data, and wherein the current webpage data is displayable by a browser embedded in an application program; sending a first update request for obtaining the webpage update data to a cache server, wherein the first update request includes the update identifier; receiving the webpage update data from the cache server based on the first update request; and updating the current webpage data based on the webpage update data; wherein: the cache server is a network node located between a Content Delivery Network (CDN) and the terminal configured to receive the webpage update data from the CDN, and send the webpage update data to the terminal upon request; and the network server is configured to store a webpage data identifier corresponding to the latest released webpage update data when a developer releases the webpage update data to the CDN.