1. A handheld device, comprising: a touch display panel, being configured to display a user interface, and sense a long pressing action of an object to generate a first touch signal; and a processor electrically connected with the touch display panel, being configured to execute a homescreen management program according to the first touch signal, and enable the touch display panel to display a homescreen management interface corresponding to the homescreen management program, wherein the homescreen management interface comprises a page navigation area and a candidate object area, and the page navigation area comprises a first page image and the candidate object area comprises an object image; wherein the touch display panel further senses a pressing action of the object to generate a second touch signal, and the processor adds the object image into the first page image according to the second touch signal.