It is effective to reduce the size of toner for fine image quality on electrophotographic system. But, in general, size production of toner is energy intensive. As its solution, the two technologies are proposed to make it possible to manufacture productively the fullcolor toners with smaller particle size in a dry process in the near future.The mechanochemical method in a dry process of toner is introduced as the production of toner. This method is that the preground chips mixed with silica are ground using the pulverizer like a jet mill and is especially suitable to produce the color toners including high content of the wax. The size reduction of thus toners is especially hard in a dry process, but the specific energy consumption as grinding efficiency has been decreased up to half when using the mechanochemical method.The grindability of the polyester resin as toner binder, which is main components of toner and controls the productivity of the toner, is also discussed. The specific energy consumption was decreased up to further half when using both high grindable resin and mechanochemical method.It is proposed in this paper that both mechanochemical method and high grindable resin should be simultaneously applied as the process of size reduction of toner for fine image quality.