Abstract: A serve-accelerometer is a kind of sensor for acceleration measuremnent. By using a servo-accelerometer, the measurements of the inclination angle along its sensing axis can be easily got. This paper presents theoretical analysis for a servo-accelerometer with flexible quartz and experimental study of the device output voltages with different inclination angles, which proves that the inclination angle measurements with high accuracy by means of sensing characteristics of the device are very feasible. The servo-accelerometer with flexible quarts, which is connected to a signal processor including the technology of extro-low frequency filtering, 16-bit A/D transformation and CPU controlled by a software, becomes a high accuracy intrument for inclination angle measurements.