A method and portable terminal for searching for a constellation using the portable terminal are provided, in which position information, direction information, and time information of the portable terminal are extracted, a constellation corresponding to the extracted position information (170), direction information (180), and time information of the portable terminal is searched, a shape of the searched constellation is displayed (160), an enlargement/reduction function is performed while displaying the constellation shape, detailed information regarding the displayed constellation is displayed, position information, direction information, and time information of the portable terminal, and the shape of the constellation and the constellation information are stored, the position information, the direction information, and the time information of the portable terminal, and the shape of the constellation and the constellation information are transmitted to a receiver, and the constellation shape is set and displayed as a background image of the portable terminal.