To meet the needs of human-computer interaction, a wearable measurement system for angle between fingers is proposed in this paper. Firstly, based on spring sheet and strain gauge, a wearable sensor for the measurement of angle between fingers and a portable measurement circuit are designed. The measurement principle of angle between fingers and measurement circuit of sensor are analyzed in detail. Secondly, computer software is developed in LabVIEW. Data captured by the developed sensor is filtered and then converted to angle information by the computer software. And the angle between fingers is synchronous dynamic displayed by means of image segmentation and rotation. Finally, experiments are carried out to verify the effectiveness of the system. The experimental results show that the designed angle sensor has a nonlinear error of 2. 38%FS, a hysteresis error of 1. 94%FS, a repeatability error of 5. 29%FS and a total accuracy of 6. 11%FS within the measurement range of 0 to 30°.