The rheological properties of emulsions gradually change to non-Newtonian fluid characteristics as the dispersed phase volume fraction increase. In premix membrane emulsification, a microporous membrane is used to prepare emulsions at higher production rates and higher volume fractions. The droplet size and droplet size distribution (span) can be precisely controlled, thus easier to study the rheological properties of emulsions. The influence of volume fraction, dispersed phase viscosity, and surfactant concentration were investigated. When the droplet size and span were controlled in a narrow range, the emulsion viscosity increased with dispersed phase viscosity due to energy loss to friction as the droplets become more rigid and less deformable, while the surfactant concentration had no significant influence on the emulsion rheology showing that surfactants mainly affect emulsion rheology through reduction of droplet size.