  The angular power spectra of cosmic microwave background are analyzed under
the light of the evolutional scenario of the universe based on the
renormalizable quantum theory of gravity in four dimensions. The equation of
evolution is solved numerically fixing the power law spectrum predicted by the
conformal gravity for the initial condition. The equation requires to introduce
a dynamical energy scale about 10^{17}GeV, where the inflationary space-time
evolution makes a transition to the big-bang of the conventional Friedmann
universe. The quality of fit to the three-year data of WMAP implies the
possibility to understand the observation by quantum gravity.
