The invention provides a page jumping method and device and a page backspacing method and device. The page jumping method is applied to an application program client. The application program client is associated with tree path information. The method comprises the steps that when a current page needs to jump to a target page, a target jump path for jumping to the target page is determined; all legal jump paths for jump of the current page are acquired based on the tree path information; and whether the target jump path is among the legal jump paths is judged, if yes, page content of the current page is cached into a stack, and the current page jumps to the target page through the target jump path. By controlling page opening paths and limiting the page opening level and order, page forward jump is in order, the problem of APP crash caused by excessive occupation of an APP memory when too many pages are opened is solved, and meanwhile the experience of a user using a web browser plug-in is improved.