1. A method for searching for recommended music using emotional information of music, the method being performed by a music search apparatus capable of searching for recommended music using the emotional information of music, the method comprising: inputting a search condition that is used to search for recommended music; searching a music emotion database (DB), which stores information about emotional values including valence values and arousal values of respective pieces of music, for emotional value information corresponding to the input search condition; retrieving the emotional value information from the input search condition, the emotional value information including a valence value and an arousal value; extracting a combination of emotion ranks corresponding to the retrieved emotional value information by using an emotion model that includes information about mixed emotions corresponding to valence values and arousal values; searching the music emotion DB for music information corresponding to the extracted emotion ranks combination; and outputting a recommended music list including music information that corresponds to the extracted emotion ranks combination.