The present invention relates to a smart bag storage service providing method performed by a smart bag storage device. The smart bag storage device comprises: a body unit comprising a controller, a memory, and a communication module; a body door for opening/closing the body unit, the body door comprising an image sensor installed on the front surface thereof to capture images of a user and to provide the captured images to the controller; and at least one storage box case disposed in the body unit so as to contain bags. The storage box case has a ventilation opening such that air is ejected to the external environment, and air can be received from the external environment. The storage box case comprises a display door, a door opening detection sensor, an image sensor, a temperature manager, a humidity manager, a dust manager, and an ultraviolet ray manager. The smart bag storage service providing method comprises: step (a) in which the controller recognizes opening/closing of the display door from the door opening detection sensor and confirms whether bags are contained; step (b) in which the image sensor captures an image of the interior of the storage box case and provides an image of contained bags to the controller; step (c) in which the controller identifies the contained bags; step (d) in which the controller establishes a storage environment appropriate for the identified bags in the storage box case through the temperature manager, the humidity manager, the dust manager, and the ultraviolet ray manager; and step (e) in which an image of clothes worn by the user is captured through the image sensor of the body door before the user goes out, and the controller recommends at least one bag among bags stored in the storage box case on the basis of the captured image.