Raman and infrared conductivity spectra are investigated to reveal two-dimensional patterns of stripe charge-ordering in theta-(BEDT-TTF)(2)RbZn(SCN)(4) and alpha'-(BEDT-TTF)(2)IBr2, Either compounds exhibit similar multiple peak pattern around the C=C stretching region in both Raman and infrared spectra owing to the electron-molecular vibration coupling and charge disproportionation. We discuss the spatial symmetry of the charge-ordering stripes from the group theoretical arguments on the selection rule of these peaks.