1. A method of transmitting an intention of a user using a captured image, the method comprising: if a signal for selecting an article category is received from a first terminal, generating a captured image of articles belonging to the selected article category and transmitting the captured image to the first terminal; if the first terminal generates tag information associated with the intention of the user based on the captured image, receiving, from the first terminal, the tag information associated with the intention of the user; and mapping the received tag information to a position of an article selected from the articles within the captured image and transmitting the captured image to which the tag information is mapped to a second terminal, wherein the mapping the received tag information comprises identifying the tag information and mapping the tag information to a predetermined position of the captured image based on the identified tag information.