Two carbazole-based pyrene compounds, 9-(4-(pyren-1-ylethynyl)phenyl)-9H- carbazole and 1,6-bis((4-(9H-carbazol-9-yl) phenyl)ethynyl)pyrene were synthesized by 1-bromopyrene, 1,6-dibromopyrene and 9-(4-ethynylphenyl)-9H-carbazole via Sonogashira coupling reaction. All proposed structures are characterized by melting point, 1H NMR and elemental analyses. Their optical properties were investigated by UV-vis absorption and emission spectra with the aim of understanding the structure-property correlations. The results indicate that the introduction of carbazole unit as electron donor in the pyrene-based molecule can increase the conjugation, structural rigid and fluorescent quantum yields of the compounds. The optical properties could be tuned by the modification of the structures. These compounds can be utilized as efficient blue fluorescent materials (λemmax = 413 ~ 446 nm, ФF = 0.58 ~ 1.08), which have potential applications in the field of organic lighting-emitting diodes (OLEDS).