The invention discloses a high-precision solid laser diagnosis debridement device for burn diagnosis and treatment, comprising a solid laser, a beam scanner, and a moving bed, wherein the solid laser determines specific working parameter through a button controlled by an operator, and transmits the parameter information to the beam scanner and the moving bed, and sends an ultra-short impulse laser of an infrared wave section; the beam scanner comprises a controller and parameter information received from the solid laser; firstly, according to the parameter information, the controller controls a motor A to rotate a reflector; and then the controller controls a motor A to rotate the reflector according to the parameter information, and then the controller controls a motor B to rotate the lens and the positions and locks the position according to the rotating angle of the reflector, so that the beam can always perpendicularly incident to the lens center, and the laser displacement sensor can measure the three-dimensional height information of a wound surface in real time and transmit the information to the controller; the controller controls a motor C to move the lens clamper according to the received three-dimensional height information.