The charge-transfer collision spectroscopy of He+-Cd and He+-Zn were studied by using crossed-beam technique. The results may be divided into two parts: (1) The resonant collision cross-sections for the energy defect less than 1 eV, which are consistent with the known theory; (2) The 4d9s2 configuration in Cd+ and 3d9s2 in Zn+ are strongly excited and it means that CT collision has important contribution to the population inversion mechanism of 441.6 and 325.0 nm laser lines in Cd+ and of 747.9 and 589.4 nm nm lines in Zn+. The resonant OT collision followed by cascade radiation may be responsible to this contribution.