An electronic device comprising: a display module for generating stereoscopic vision, and configured to display a stereoscopic image using a left eye's image and a right eye's image; and a controller configured to: display a first stereoscopic image including a plurality of objects on the display module, wherein the plurality of objects include at least one first object having a negative parallax, receive a request to start a screen shift process for shifting the first stereoscopic image displayed on the display module to a second stereoscopic image including a plurality of objects, wherein the plurality of objects include at least one second object having a negative parallax, adjust the negative parallax of each of the at least one first object and the at least one second object to be a positive parallax by relocating the at least one first object and the at least one second object in the left eye's image and the right eye's image, respectively, except for objects having a positive parallax among the plurality of objects, while shifting the first stereoscopic image to the second stereoscopic image, display at least a part of the first stereoscopic image and at least a part of the second stereoscopic image with a positive parallax during shifting the first stereoscopic image to the second stereoscopic image, and restore the parallax of the second stereoscopic image to an original value upon completion of the screen shift process. a display module for generating stereoscopic vision, and configured to display a stereoscopic image using a left eye's image and a right eye's image; and a controller configured to: display a first stereoscopic image including a plurality of objects on the display module, wherein the plurality of objects include at least one first object having a negative parallax, receive a request to start a screen shift process for shifting the first stereoscopic image displayed on the display module to a second stereoscopic image including a plurality of objects, wherein the plurality of objects include at least one second object having a negative parallax, adjust the negative parallax of each of the at least one first object and the at least one second object to be a positive parallax by relocating the at least one first object and the at least one second object in the left eye's image and the right eye's image, respectively, except for objects having a positive parallax among the plurality of objects, while shifting the first stereoscopic image to the second stereoscopic image, display at least a part of the first stereoscopic image and at least a part of the second stereoscopic image with a positive parallax during shifting the first stereoscopic image to the second stereoscopic image, and restore the parallax of the second stereoscopic image to an original value upon completion of the screen shift process. display a first stereoscopic image including a plurality of objects on the display module, wherein the plurality of objects include at least one first object having a negative parallax, receive a request to start a screen shift process for shifting the first stereoscopic image displayed on the display module to a second stereoscopic image including a plurality of objects, wherein the plurality of objects include at least one second object having a negative parallax, adjust the negative parallax of each of the at least one first object and the at least one second object to be a positive parallax by relocating the at least one first object and the at least one second object in the left eye's image and the right eye's image, respectively, except for objects having a positive parallax among the plurality of objects, while shifting the first stereoscopic image to the second stereoscopic image, display at least a part of the first stereoscopic image and at least a part of the second stereoscopic image with a positive parallax during shifting the first stereoscopic image to the second stereoscopic image, and restore the parallax of the second stereoscopic image to an original value upon completion of the screen shift process.