In this work we preset a different sistemathic methodology to analyse the geomorphology o f the karstic cave systems, with the aim to show how the same behaviour, in roughness, appears at different working scales. This scaling effect coud be undestood as a fractal character o f the morphology. So, first of all a self similar orselfaffin fractal scaling must be identified in the cave, and the scale interval where it takes place. After an appropiate fractal analisys, is done by means of an Inverse Box Counting Method (MIBC), as presented in Paredes (1995). Finally, we study the area-perimetrer, and the resuls we get show as the fractal behaviour in whole cave system. This studiy Is applied to the Cap de la Lesse karstic cave system