Vibration monitor with high performance can collect vibration data from three different directions with a speed of a thousandth of a second. Piezoelectric sensor and digital signal processing are combined to accurately analysis and process vibration signal including its frequency, amplitude and duration, thus telling and processing real attacks from natural vibration interference and ensuring rapid, reliable and the best detection performance and the powerful anti-false alarm function. Speed sensor often uses electric sensor which consists of permanent magnet, coil, spring, damper and shell. The sensor enjoys high sensitivity, large detection range and good stability. But the processing and the price are relatively higher. Generally, accelerometer sensor uses piezoelectric accelerometer which utilizes mechanical deformation of piezoelectric materials caused by vibration to generate charge. Then determine vibration magnitude according to the charge and take the circuit to adjust sensitivity.