Details about the spatiotemporal development of root systems and their influence On ring-width variations in tree stems are still unknown. Furthermore, their size, spread and architecture play all important role in studying tree stability and their stabilizing effect oil slopes. A major problem in this regard is the detailed 3D-data acquisition and modeling of its complex structure. The application of a laser scanner is a step towards the Solution of this problem. Scanning the root system of a mature spruce tree facilitated creating a 3D scatter-plot of the root Structure (resolution: 2 mm). The subsequent modeling of the structure allowed all automated replication of the coarse root structure down to a size of 0.5 cm of single roots. The resulting model of tile root system facilitates cutting the roots for ring-width analysis while tagging the sample points in tile model as a base for the further analysis of tile root system's development.