The photodissociation dynamics of AlO at 193 nm is studied using time-sliced ion velocity mapping. Two dissociation channels are found through the speed and angular distributions of aluminum ions: one is one-photon dissociation of the neutral AlO to generate Al($ ^2 $P$ _ \rm{u} $)+O($ ^3 $P$ _ \rm{g} $), and the other is two-photon ionization and then dissociation of AlO$ ^+ $ to generate Al$ ^+ $($ ^1 $S$ _ \rm{g} $)+O($ ^3 $P$ _ \rm{g} $). Each dissociation channel includes the contribution of AlO in the vibrational states $ v $ = 0-2. The anisotropy parameter of the neutral dissociation channel is more dependent on the vibration state of AlO than the ion dissociation channel.