The angular momentum orientation and alignment in single rotational states of the IR inactive vibrational mode (v″=1) in the electronic ground state of acetylene (X 1∑ + g, v″ 2=1,J″) has been selectively prepared by using circularly and linearly polarized laser stimulated Raman pumping. From the induced electronic transition fluorescence spectra by a circularly and linearly polarized UV laser, A 1* A u(v″=1)←X 1∑ + g (v″ 2=1), the A (1) 0 (orientation) of C 2H 2 (X 1∑ + g, v″ 2=1,J″=4,7,8,9,10,11,12,13) are measured directly in the range between 0.7 and 0.8. The A (2) 0 (alignment) for J″=2,3,4,5,6,7,8,9,11 is -0.7～-0.9. This results show that the spatial population of angular momentum of C 2H 2 molecule before reactions can be controlled by this laser pumping technique.