A wearable electromyogram sensor system is provided. The wearable electromyogram sensor system includes: an elastic band having a plurality of electrodes an electromyogram sensor including an electrode connected to an electrode of the band so as to receive a bio-signal related to contraction of a muscle, and configured to sense a change of motion information through the bio-signal or previously sense the change of the motion information before the motion information is changed and a fixing unit fixing the electromyogram sensor to the band. The electrode of the electromyogram sensor is connected to an electrode at an arbitrary position of the band.
