  We investigate the temperature and energy on holographic screens for
4-dimensional black holes with the entropic force idea proposed by Verlinde. We
find that the "Unruh-Verlinde temperature" is equal to the Hawking temperature
on the horizon and can be considered as a generalized Hawking temperature on
the holographic screen outside the horizons. The energy on the holographic
screen is not the black hole mass $M$ but the reduced mass $M_0$, which is
related to the black hole parameters. With the replacement of the black hole
mass $M$ by the reduced mass $M_0$, the entropic force can be written as
$F=\frac{GmM_0}{r^2}$, which could be tested by experiments.
