This paper proposes music retrieval system according to the pattern of human walking. Firstly, we have tried to get walking pattern using 3-axis acceleration sensor put on waist of subject. We have extracted walking tempo through noise reduction and observation of the vertical axis. Secondly, we developed a music tempo system on the base of tempo (bpm) matching with those of music which are extracted automatically by Mix Meister from ten thousand of Mp3 data. Then we have also examined the sensor of smoothness of walking to keep higher walking tempo, such as +10, +15 and +20 per minute (bpm) compared to the subjects normal speed.
