I opened the .ecw file with qgis but I found that the ortophoto is 340 mt northern and 150 mt eastern the topographic map. How can I move the ecw?
If both layers are UTM and do not align, there is a chance that they don't share the same datum.
So one can be ED50 UTM 32N, and the other WGS84 UTM 32N.
In this case,
Rightclick -> Set CRS for Layer is the right tool to change one layer or the other (but not both, because then they will both end up shifted, but not relative to each other).