A robot positioning system having a camera, a processing unit and at least a first line laser. The first line laser is arranged to illuminate a space by projecting vertical laser beams within field of view of the camera. The camera is arranged to record a picture of the space illuminated by the vertical laser beams, and the processing unit is arranged to extract, from the recorded picture, image data representing a line formed by the vertical laser beams being reflected against objects located within the space. The processing unit is further arranged to create, from the extracted line, a representation of the illuminated space along the projected laser lines, in respect of which the robot is positioned. Methods of positioning a robot are also provided.