A mobile phone is electronics with 2D and 3D display function, having a first casing and a second casing linked to allow the phone to be foldable, and including a first display unit located inside with the phone folded, and selectively switching and displaying 2D and 3D images, and a second display unit located outside with the phone folded, and displaying a 2D image. When the mobile phone is opened or open the first display unit displays an idle screen in a 3D image as desired.