PROBLEM TO BE SOLVED: To provide a dialysis system capable of preparing dialysate comprising the same composition with dialysate prepared with liquid agent A, even if powder agent A is used.SOLUTION: A dialysis system dissolves powder dialysis agent comprising a saccharide component, dilutes it and then supplies the resultant to one or more dialysis devices for carrying out dialysis therapy on a patient. The dialysis system comprises a storing part which temporarily stores objective solution as concentrated solution provided by dissolving the powder dialysis agent or dialysate prepared by mixing the concentrated solution with at least dilution water. Storage capacity of the storing part is a capacity defined so that waiting time starting from dissolution of the powder dialysis agent until the solution is supplied to the dialysis devices via the storing part is equilibrium time or more in which the rate of isomers in the saccharide component reaches equivalent in which the rate of isomers is constant.
