Microphase separations of block copolymers have been widely studied in soft matter physics and materials chemistry due to unique morphologies, which depend on their composition, segment-segment interaction parameters, and degree of polymerization. Recently, there are a few reports on phase separation of block copolymers in cylindrical and spherical confining geometries. In this study, we report the microphase separation within the spherical confined geometry for the artificial polymeric microparticles and thin membrane in spherical symmetry for the artificial polymeric vesicles. For this, single and double emulsion droplets were employed, of which shell phase contains blends of symmetric poly(styrene)-block-poly(butadiene)-block-poly(styrene) (PS-b-PB-b-PS) and polystyrene homopolymer (hPS). We found various microphases in the spherical membrane, which depended on the weight fraction of PS chain (f) in the polymer blends. f was varied by the addition of polystyrene homopolymers (hPS) and microphase transition was observed for hPS which have much lower molecular weight than that of PS chains of PS-b-PB-b-PS. As the weight fraction of PS chain is increased, we observed the phase transition from cylinder to onion-like lamellae, cylinder, perforated lamellae and spheres. In addition, the surface property was controlled by amphiphilic diblock copolymer surfactants which have selective affinity with PB block of PS-b-PB-b-PS and the effect of surface preference on the microphase separation of polymer blend in spherical membrane was observed. Also, monodisperse polymer microcapsules were prepared using glass microcapillary device.