  Taking into account that Sandage-Loeb test is unique in its coverage of the
redshift desert and available in the near future, we explore the cosmic time
evolution behavior of the source redshift for holographic dark energy model, an
important competing cosmological model. As a result, we find that Sandage-Loeb
test can provide a extremely strong bound on $\Omega^0_m$, while its constraint
on another dimensionless parameter $\lambda$ is weak. In addition, it is
proposed here for the first time that we can also constrain various
cosmological model by measuring the value of $z_{max}$ at which the peak of
redshift velocity occurs. Combining this new proposed method with the
traditional Sandage-Loeb test, we should be able to provide a better constraint
on $\lambda$, at least from the theoretical perspective.
