Various embodiments of the present disclosure relate to an electronic device and a method of providing an augmented reality object thereof. The electronic device includes: a touchscreen; a first camera capturing a first image; a second camera capturing a second image; a processor operatively coupled with the touchscreen, the first camera, and the second camera; and a memory operatively coupled with the processor, wherein the memory stores instructions, when executed, causing the processor to: display the first image captured via the first camera on the touchscreen; receive a user input for adding at least one augmented reality object having at least one reflective surface on the first image; acquire the second image via the second camera in response to the user input; identify an angle of the reflective surface; and perform perspective transformation on the second image on the basis of the identified angle, and apply at least part of the perspective-transformed second image to each reflective surface of the augmented reality object. Other various embodiments are possible.