BiFeO3, a material with coexistence of antiferromagnetic and ferroelectric phases at room temperature, has been expecting to be used on novel devices such as FeRAM and spintronics. In this research, it is found that the surface morphologies of SrTiO3 influence the subsequence growth of SrRuO3 and Pb-dopant BiFeO¬3 (PBFO) films. The domain structures are associated to various surface structure and different thickness of PBFO investigated by a piezoresponse force microscopy. The radial-polarization-like domains was found on the PBFO island structures, and the domain size and the remnant piezoresponse increases with the thickness increasing; in contrary, the shifting of the electric coercive field occurs in the thinner films.