A method for controlling an electronic device including at least one processor configured to encrypt an image and upload the encrypted image to an external server by using an artificial intelligence neural network model is provided. The method includes receiving a command to upload an image to the external server; acquiring, based on the command, a characteristic value corresponding to the image by inputting the image and a key of the electronic device into a neural network model trained to identify characteristic values based on an input image and an input key; and transmitting identification information of the image and the characteristic value to the external server.