In this paper, we studied the ργ * → π and ργ * → ρ transition processes and made the calculations for the ρπ transition form factor Q 4 F ρπ (Q 2 ) and the ρ meson electromagnetic form factors, F LL,LT,TT (Q 2 ) and F 1,2,3 (Q 2 ), by employing the perturbative QCD (PQCD) factorization approach. For the ργ * → π transition, we found that the contribution to form factor Q 4 F ρπ (Q) from the term proportional to the distribution amplitude combination φ T ρ (x 1 )φ P π (x 2 ) is absolutely dominant, and the PQCD predictions for both the size and the Q 2 -dependence of this form factor Q 4 F ρπ (Q 2 ) agree well with those from the extended ADS/QCD models or the light-cone QCD sum rule. For the ργ * → ρ transition and in the region of Q 2 ≥ 3 GeV 2 , further more, we found that the PQCD predictions for the magnitude and their Q 2 -dependence of the F 1 (Q 2 ) and F 2 (Q 2 ) form factors agree well with those from the QCD sum rule, while the PQCD prediction for F 3 (Q 2 ) is much larger than the one from the QCD sum rule.