Abstract: Recently, the laser technology is applied to agriculture popularly, and farm product quality detecting using laser is a new tendency in laser technology application. The overview is given on three methods of the laser detecting farm product in this paper. The first one is laser absorbing or scattering, which is used to inspect sugar and acid content, firming, PH value, maturity degree, dry matter of fruit and vegetable. The second method is laser induced fluorescence; which is used to inspect pesticide residue, chlorophyll, maturity of fruit and vegetable. The third method is laser Raman Spectroscopy, which is used to detect fruit damage and pesticide residue. The further research approaches and development direction were proposed.