An apparatus for producing tofu coagulant includes a liquid food oil pumping pathway, a liquid food oil tank, a mineral salt solution pumping pathway, a mineral salt solution tank, a plurality of metering pumps, and an emulsion dispersion machine for stirring the liquid food oil with the mineral salt solution to an emulsification phase. The liquid food oil pumping pathway is connected with the mineral salt solution pumping pathway, the mineral salt solution is added in a predetermined ratio for producing the tofu coagulant, and the water phase and the oil phase are stirred and mixed to W/O type (water in oil type) emulsion (without emulsifier).