In this paper, a new method for representing the surface of revolution using rational B-splines in CAD is described. If the profile curve has been denoted by a nonuniform rational quadratic B-spline curve, it is very convenient to represent the surface of revolution as a nonuniform rational biquadratic B-spline surface. Thus we can treat circular cylindric surface, circular conic surface, torus, sphere, surface of revolution and free surfaces by one computer procedure. It is useful in CAD. Finally, we give some examples for representing surface of revolution and sphere as rational B-spline patches.