Ordered microporous films were fabricated on the process of solvent evaporation for the solution of amphiphilic poly(acrylic acid)-block-polystyrene under a humid atmosphere. Pore size and its distribution are strongly dependent on the nature of polymers and the evaporation conditions. Poly(aniline) dots were also successfully fabricated via electropolymerization of aniline using a microporous film on indium tin oxide electrode as a template.