Based on triangulation method, the closed loop of the control system was used to control the output of the laser pulse. Acousto-optic Q-switched Nd∶YAG pulsed laser was employed to dress bronze-bonded diamond wheels in orthogonal direction. Diffuse and imaging situation of the wheel surface has been studied. Through comparative analysis, the cylindrical lens was selected, A set of fairly complete receive optical system was improved, and the laser ablation system was calibrated. According to the results of calibration, the circuit was adjusted, reasonable laser and technological parameters was selected to carry on the laser truing and dressing experiment for the wheel. The results show that accuracy was significantly improved. Based on those above, the technique of laser-machinery truing and dressing of bronze-bonded grinding wheel has been studied. Namely, the grinding wheel was trued and dressed by mechanical method after trued and dressed by laser. The accuracy was further improved, and the surface topography was improved too.