Provided are an electrophotographic toner set capable of preventing toner particles flying apart, preventing poor development and maintaining a certain image concentration free of the influence of a printing environment or keeping the electric charge of the toner in a certain amount even though repeated printing is performed, an image forming apparatus, and an image forming method. The electrophotographic toner set includes a developer toner and a replenishment toner. The developer toner and the replenishment toner each include toner particles, and silica particles and titania particles provided on the surfaces of the toner particles. The silica particles have a BET specific surface area of 15 to 95 m<2>/g and are surface-treated with a silicone oil. The relationship between the content ofthe silica particles of the developer toner and the content of the silica particles of the replenishment toner, and the relationship between the content of the titania particles of the developer toner and the content of the titania particles of the replenishment toner each have particular values.