Method to prepare a beverage in a machine for preparing beverages, characterized in that it comprises: - receiving through a user interface associated with a control and command unit the selection of a type of beverage to be prepared selected between a beverage obtained by infusion, or only hot water; - based on the type of beverage selected by the user, disabling the commands of said user interface not connectable to the type of beverage selected, or enabling the commands correlated to said type of beverage selected, in order to allow and simplify the selection by the user of further specific organoleptic characteristics for said type of beverage selected, wherein if a beverage obtained by infusion is selected the control and command unit enables commands of the user interface suitable to select quantity, concentration, and/or temperature or commands for special infusion functions (54, 55, 56) and if hot water is selected, the control and command unit enables commands of the user interface to select quantity and/or temperature, and disables those for the selection of the concentration, or for the possible special infusion functions (54, 55, 56); - receiving and verifying the characteristics selected by the user as a function of the type of beverage selected by means of said commands, comprising at least one of either quantity, temperature, concentration, and/or particular functions of infusion; - conditioning the various functioning factors of said machine in relation to said specific selected characteristics and the operating parameters provided for said beverage selected; - depending on the type of beverage selected, determining the state of a diversion element disposed along a circuit for the water to selectively and fluidly connect a tank to a first outlet for the brewed beverage, or to a second outlet for hot water; - regulating the operation of a pump and of a heating device to regulate the temperature and the flow rate of the water to be delivered according to the operating parameters provided for obtaining a selected beverage with said specific organoleptic characteristics selected. - receiving through a user interface associated with a control and command unit the selection of a type of beverage to be prepared selected between a beverage obtained by infusion, or only hot water; - based on the type of beverage selected by the user, disabling the commands of said user interface not connectable to the type of beverage selected, or enabling the commands correlated to said type of beverage selected, in order to allow and simplify the selection by the user of further specific organoleptic characteristics for said type of beverage selected, wherein if a beverage obtained by infusion is selected the control and command unit enables commands of the user interface suitable to select quantity, concentration, and/or temperature or commands for special infusion functions (54, 55, 56) and if hot water is selected, the control and command unit enables commands of the user interface to select quantity and/or temperature, and disables those for the selection of the concentration, or for the possible special infusion functions (54, 55, 56); - receiving and verifying the characteristics selected by the user as a function of the type of beverage selected by means of said commands, comprising at least one of either quantity, temperature, concentration, and/or particular functions of infusion; - conditioning the various functioning factors of said machine in relation to said specific selected characteristics and the operating parameters provided for said beverage selected; - depending on the type of beverage selected, determining the state of a diversion element disposed along a circuit for the water to selectively and fluidly connect a tank to a first outlet for the brewed beverage, or to a second outlet for hot water; - regulating the operation of a pump and of a heating device to regulate the temperature and the flow rate of the water to be delivered according to the operating parameters provided for obtaining a selected beverage with said specific organoleptic characteristics selected.