Test device and method of disc asymmetry

The invention discloses test device and method of disc asymmetry. The device comprises an RF signal reading system, an equalizer, a comparative level generator, a first comparator, a high-pass filter, an upper half-wave extractor, a lower half-wave extractor, a peak holding device, a valley value holding device, a reverser, a first peak detector, a first valley value detector, a second valley value detector, a second peak detector and a data processing system, wherein the equalizer, the comparative level generator, the first comparator, the high-pass filter, the upper half-wave extractor, the lower half-wave extractor, the peak holding device, the valley value holding device, the reverser, the first peak detector, the first valley value detector, the second valley value detector and the second peak detector can be realized on a programmable logic gate array. The invention has the advantages of simple principle, convenient realization, reliability, practicability, flexibly extended functions and high cost performance.