Three types of evaluation on laser beam quality such as near-field quality, far-field quality, and propagation quality are summarized. The parameters include modulation ratio and contrast ratio of near-field, focused spot size, far-field divergence angle, times diffraction limited factor β, Strehl rate, energy circle rate, M2 factor, etc. The application range, strong point and shortcoming of them especially used in evaluating beam quality of high power laser beam are discussed. Furthermore, a matrix of M2 factor for comprehensive evaluating astigmatic beam has been proposed, and the invariant value is given.