Abstract: In the paper,a new method based on score is presented and a query by humming system—“Music Angle” is implemented. The score contour and the pitch difference table are firstly constructed. Then the pitch contour characters are picked up and converted to score contour characters.In the end the querying results are obtained by dynamic programming algorithm.The results show that the system are very robust against surroundings noise,and the top-5success rate is over 90％ in a music database comprised 405 songs.