An electronic device and a user interface display method thereof are provided. The method includes the following steps. First, organize a plurality of computer programs and a web browser executable on the electronic device into a virtual book. Each page of the virtual book includes a user interface of one of the computer programs or a web page displayed by the web browser. Next, display one of the pages as a current page so that the user interface or the web page of the current page is accessible to a user of the electronic device. Next, display a stand-up view of the virtual book in response to a first operating action performed by the user. The stand-up view includes a plurality of the pages adjacent to the current page and a virtual switch attached to a side of the virtual book.