18. A similar music search method, comprising: classifying a mood and a genre of a music file using a music content summary generated based on an audio feature value extracted from the music file by decoding only a select compressed portion of the music file of all compressed portions of the music file, wherein the select compressed portion includes the extracted audio feature value and the extracted audio feature value is a Modified Discrete Cosine Transformation-based feature; extracting a similarity feature for a similarity retrieval from the music content summary; storing information on the classified mood and genre and an extracted similarity feature from the music content summary; detecting a mood and a genre of an input query music; measuring a similarity between the query music and music files that are identical in mood and genre to the query music by referring to the database; and retrieving the similar music with respect to the query music based on the measured similarity.
18. A similar music search method, comprising: classifying a mood and a genre of a music file using a music content summary generated based on an audio feature value extracted from the music file by decoding only a select compressed portion of the music file of all compressed portions of the music file, wherein the select compressed portion includes the extracted audio feature value and the extracted audio feature value is a Modified Discrete Cosine Transformation-based feature; extracting a similarity feature for a similarity retrieval from the music content summary; storing information on the classified mood and genre and an extracted similarity feature from the music content summary; detecting a mood and a genre of an input query music; measuring a similarity between the query music and music files that are identical in mood and genre to the query music by referring to the database; and retrieving the similar music with respect to the query music based on the measured similarity. 19. A computer-readable storage medium in which a program for executing the similar music search method of claim 18 is recorded.