  We study the electromagnetic structure of the pion in terms of the quantum
cromodynamic~(QCD) model on the Breit-frame. We calculated the observables,
such as the electromagnetic form factor. The priori to have a calculation
covariant need to get the valence term of the eletromagnetic form factor. We
use the usual formalism in quantum field theory (QFT) and light-front quantum
field theory (LFQFT) in order to test the properties of form factor in
nonperturbative QCD. In this particular case, the form factor can be obtained
using the pion Light-Front (LF) wave function including self-energy from
Lattice-QCD. Specifically, these calculations was performed in LF formalism. We
consider a quark-antiquark vertex model having a quark self-energy. Also we can
use other models to compare the pion electromagnetic form factor with different
wave function and to observe the degree of agreement between them.
