This paper introduces a smart laser range sensor with many advantages over the current products. The device is portable for its lightness and possessing simplest components. The image data is recorded in digital videotape for late processing, which allows it to be used in wide areas and places just as shooting pictures by a camera. The measuring scope can be freely adjusted to cover various distances, which greatly saves manpower in measuring immovable objects or a site. The system employs post calibration so that it can be used easily onsite. Further, we obtain color of measured points, which has been realized so far only by complicated systems in constrained environments. All these functions are realized by spatial temporal analysis of the video images. This sensor system has been used in measuring unearthed relics at a world heritage site