An electronic device may include: a camera, a display, a processor operatively coupled to the camera and the display, and a memory operatively coupled to the processor. The memory may store a plurality of avatar templates containing a plurality of gestures and instructions. The instructions, when executed by the processor may control the electronic device to: obtain an image of an external object using the camera, obtain a value of at least one parameter corresponding to an emotion state based on the obtained image, select an avatar template including a first gesture from among the plurality of avatar templates based on the value of the at least one parameter, generate an avatar sticker including a second gesture different from the first gesture based on the selected avatar template and the value of the at least one parameter, and display the generated avatar sticker on at least a portion of the display.