In the present work, to investigate the nuclear structure of 6Li, the charge form factor and the charge radius of 6Li have been calculated. Within the framework of Effective Field Theory (EFT) at low energy, the charge form factor and the root-mean-squared charge radius of 6Li calculated in the zero-momentum-transfer limit based on cluster structure of 6Li. The results of this model for the root-mean-squared charge radius of 6Li at low energies are comparable with the available experimental data and those of other theoretical models.