A method for scanning and measuring points of an object is provided. The method includes: (a) selecting a measuring start point and a measuring end point from an image of the object; (b) controlling a laser to move and scan the object from the measuring start point to the measuring end point with a predetermined distance according to X-axis coordinate values and Y-axis coordinate values of the measuring start point and the measuring end point to obtain scanned measuring points; (c) obtaining a vertical distance between each of the scanned measuring points and the laser; and (d) computing measuring results, namely computing a Z-axis coordinate value of each of the scanned measuring points according to the corresponding vertical distance. A related system is also provided.