The invention discloses a portable driver vision field measurement device and a measurement method. The measurement device comprises a driver position camera device and a vehicle front road surface quantization device; the driver position camera device comprises height adjustable camera equipment easily fixed on a driver position, the camera equipment is as high as the eyes of a driver in work, and the camera equipment is located at the position corresponding to the center of the two eyes of the driver in the driving; the vehicle front road surface quantization device comprises a road surface part and a shooting subject matter, the road surface part moves along the road surface, the shooting subject matter and the road surface part are detachably connected, the shooting subject matter is provided with a coordinate system, the measurement device further comprises a control unit and a storage unit, the control unit controls the road surface part to drive the shooting subject part to move, and the camera equipment is controlled in the process to shoot a picture synchronously and transmit the picture to the storage unit to be stored. The measurement device is simple and convenient, can be conveniently equipped for each police treating the case; the measurement device finishes measurement on the site without doing experiments after the event, and the accuracy is improved.