A refrigerator, comprising: a main body including a storage room (11, 12, 13); a door (20, 30, 40, 50) coupled to the main body and rotatable in front of a side of the storage room (11, 12, 13), and including a display on a front surface of the door (20, 30, 40, 50); a camera disposed to capture an image of the storage room; a memory; and at least one processor, wherein the at least one processor is configured to display an augmented-reality object capable of performing interaction with a user on the display by: capturing the image of the storage room (11, 12, 13) of the refrigerator by the camera; based on a request for an augmented reality user interaction, identifying a type of an augmented-reality object to be displayed; based on the identified type of the augmented-reality object to be displayed, acquiring an augmented-reality object corresponding to at least one food included in the captured image of the storage room (11, 12, 13) by inputting the captured image to a user-specific trained artificial intelligence model, wherein the user-specific trained artificial intelligence model is selected corresponding to the specific user currently using the refrigerator from a plurality of user-specific trained artificial intelligence models, each trained based on information of one of a plurality of users so as to personalize the artificial intelligence model to the user; displaying, on an area where the at least one food is located in the captured image, the acquired augmented-reality object by overlapping the acquired augmented-reality object with the captured image of the storage room (11, 12, 13); and based on a user input being received while the augmented reality object is displayed on the area, providing a response to the user input using the displayed augmented-reality object. a main body including a storage room (11, 12, 13); a door (20, 30, 40, 50) coupled to the main body and rotatable in front of a side of the storage room (11, 12, 13), and including a display on a front surface of the door (20, 30, 40, 50); a camera disposed to capture an image of the storage room; a memory; and at least one processor, wherein the at least one processor is configured to display an augmented-reality object capable of performing interaction with a user on the display by: capturing the image of the storage room (11, 12, 13) of the refrigerator by the camera; based on a request for an augmented reality user interaction, identifying a type of an augmented-reality object to be displayed; based on the identified type of the augmented-reality object to be displayed, acquiring an augmented-reality object corresponding to at least one food included in the captured image of the storage room (11, 12, 13) by inputting the captured image to a user-specific trained artificial intelligence model, wherein the user-specific trained artificial intelligence model is selected corresponding to the specific user currently using the refrigerator from a plurality of user-specific trained artificial intelligence models, each trained based on information of one of a plurality of users so as to personalize the artificial intelligence model to the user; displaying, on an area where the at least one food is located in the captured image, the acquired augmented-reality object by overlapping the acquired augmented-reality object with the captured image of the storage room (11, 12, 13); and based on a user input being received while the augmented reality object is displayed on the area, providing a response to the user input using the displayed augmented-reality object. capturing the image of the storage room (11, 12, 13) of the refrigerator by the camera; based on a request for an augmented reality user interaction, identifying a type of an augmented-reality object to be displayed; based on the identified type of the augmented-reality object to be displayed, acquiring an augmented-reality object corresponding to at least one food included in the captured image of the storage room (11, 12, 13) by inputting the captured image to a user-specific trained artificial intelligence model, wherein the user-specific trained artificial intelligence model is selected corresponding to the specific user currently using the refrigerator from a plurality of user-specific trained artificial intelligence models, each trained based on information of one of a plurality of users so as to personalize the artificial intelligence model to the user; displaying, on an area where the at least one food is located in the captured image, the acquired augmented-reality object by overlapping the acquired augmented-reality object with the captured image of the storage room (11, 12, 13); and based on a user input being received while the augmented reality object is displayed on the area, providing a response to the user input using the displayed augmented-reality object.