  We investigate the behavior of entanglement entropy in the holographic QCD
model proposed by Gubser et al. By choosing suitable parameters of the scalar
self-interaction potential, this model can exhibit various types of phase
structures: crossover, first order and second order phase transitions. We use
entanglement entropy to probe the crossover/phase transition, and find that it
drops quickly/suddenly when the temperature approaches the critical point which
can be seen as a signal of confinement. Moreover, the critical behavior of the
entanglement entropy suggests that we may use it to characterize the
corresponding phase structures.
