System for dispensing a beverage, preferably espresso coffee, comprising: - at least one machine for dispensing the beverage, comprising at least one dispensing unit (2.1, 2.2, 2.3), preferably a plurality of dispensing units, each comprising at least one control element for controlling the dispense of the beverage (10a, 10a', 10b, 10b', 10c, 10c') according to a predefined dispensing program; - at least one grinding device (20, 120), preferably a plurality of grinding devices, each comprising at least one container (21, 121) for an ingredient to be ground for preparing the beverage, at least one adjustable millstone (22, 122) for grinding said ingredient and forming a ground ingredient, at least one delivering unit (23, 123) for delivering a dose of ground ingredient in at least one filter-holder (50a, 50b, 50c), at least one selection element (25a, 25b, 25c, 125a, 125b, 125c) for selecting a predetermined dose of ground ingredient to be delivered in the filter-holder, - at least one filter-holder (50a, 50b, 50c), preferably a plurality of filter- holders, each filter-holder being provided with at least one identification element (55a, 55b, 55c), wherein said identification element (55a, 55b, 55c) is indicative of the predetermined dose of ground ingredient; wherein said at least one selection element (25a, 25b, 25c, 125a, 125b, 125c) of the at least one grinding device (20, 120) is associated with a respective filter-holder (50a, 50b, 50c) and is configured to be operated, in use, by a user depending on the identification element (55a, 55b, 55c) of the filter-holder inside which delivering the ground ingredient. - at least one machine for dispensing the beverage, comprising at least one dispensing unit (2.1, 2.2, 2.3), preferably a plurality of dispensing units, each comprising at least one control element for controlling the dispense of the beverage (10a, 10a', 10b, 10b', 10c, 10c') according to a predefined dispensing program; - at least one grinding device (20, 120), preferably a plurality of grinding devices, each comprising at least one container (21, 121) for an ingredient to be ground for preparing the beverage, at least one adjustable millstone (22, 122) for grinding said ingredient and forming a ground ingredient, at least one delivering unit (23, 123) for delivering a dose of ground ingredient in at least one filter-holder (50a, 50b, 50c), at least one selection element (25a, 25b, 25c, 125a, 125b, 125c) for selecting a predetermined dose of ground ingredient to be delivered in the filter-holder, - at least one filter-holder (50a, 50b, 50c), preferably a plurality of filter- holders, each filter-holder being provided with at least one identification element (55a, 55b, 55c), wherein said identification element (55a, 55b, 55c) is indicative of the predetermined dose of ground ingredient; wherein said at least one selection element (25a, 25b, 25c, 125a, 125b, 125c) of the at least one grinding device (20, 120) is associated with a respective filter-holder (50a, 50b, 50c) and is configured to be operated, in use, by a user depending on the identification element (55a, 55b, 55c) of the filter-holder inside which delivering the ground ingredient.