Five carbazole-based fluorescent molecules were incorporated into mesoporous molecular sieve MCM-41 by impregnation method. Their photophysical properties were investigated systematically via XRD, UV-vis absorption and emission spectra in both solution and solid states. The absorption and emission properties of these fluorescent materials could be effectively changed by loading with MCM-41. These carbazole-based fluorescent molecules dispersed in the MCM-41 mesoporous channels and no obvious mass losses at the range of 100 ~ 350 oC, which indicate that the thermal stabilities of these materials are improved. Meanwhile, these hybrid materials show significant blue-shifts in their UV-vis absorption and fluorescent spectra compared to the fluorescent molecules in solid state. These hybrid materials can be utilized as efficient blue fluorescent materials (λemmax = 401 ~ 435 nm).