  We study the evolution of the universe by assuming an integrated model, which
involves interacting dark energy and holographic principle with Hubble scale as
IR cutoff. First we determined the interaction rate at which matter is
converting to dark energy. In the next step, we evaluated the equation of state
parameter which describes the nature of dark energy. Our result predicts that
the present state of the universe is dominated by quintessence type dark energy
and it will become phantom dominated in near future. Again our analysis
successfully addresses the problem of present accelerated expansion of the
universe and softens the coincidence problem. We also found that the universe
was previously undergoing a decelerated phase of expansion and transition from
deceleration to acceleration would occur at a time $t_{q=0}=0.732 t_0$, where
$t_0$ is the present age of the universe. Finally, we discuss the evolution of
Black Holes in this environment.
