A device for transmitting a reply message is provided. The device includes a communication unit configured to receive a question message from another device, a controller configured to determine a category of the question message, a display unit configured to display a user interface (UI) for selecting data to be included in a reply message to the question message, according to the category, and a user input unit configured to receive a user input of selecting data to be included in the reply message through the UI, wherein the communication unit transmits the reply message including the data to the other device.