A self-transforming flexible electronic device, according to an embodiment of the present invention, comprises: a substrate having flexible properties and a flexible electronic device attached thereon; shape memory alloys provided on one lateral side of the substrate; and photoresists for fixing the shape memory alloys to the substrate, wherein the shape memory alloys are arranged on the substrate in the form of a plurality of lines, the photoresists are disposed in plurality along the extension direction of each shape memory alloy, and the shape memory alloys can be fixed inside the photoresists and at a predetermined distance away from the substrate.