An electronic device and a user interface display method thereof are provided. The method organizes a plurality of computer programs and a web browser executable on the electronic device into a virtual book including a plurality of ordinary pages and a list page. Each ordinary page of the virtual book includes a user interface of one of the computer programs or a web page displayed by the web browser. When one of the ordinary pages is displayed as the current page, the user interface or the web page of the current page is accessible to the user of the electronic device. The list page includes a plurality of entries and each of the entries represents one of the ordinary pages.