The quantum coherence properties of atom laser induced from atomic Bose-Einstein condensation (BEC) interacting with several sorts of important light fields are studied by quantum theory. The results show that the atom lasers induced by light field in Fock state, coherent state, and squeezing coherent state are always anti-bunching, the nth-order coherent, and bunching, respectively. These results indicate that the quantum coherence properties of atom laser are completely identical to that of the initial light field interacting with the atomic BEC.