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 terminal, capturing articles belonging to the selected article category in the captured image and transmitting the captured image to the terminal; receiving, from the terminal, tag information associated with the intention of the user which is generated based on the captured image; and mapping the received tag information to a predetermined position of the captured image and transmitting the captured image to which the tag information is mapped to the terminal.