Method of operating a home automation system comprising: - at least one home automation equipment item (1a, 2a, 2b, 2c, 3a, 3b, 4a, 5a) of a building, the home automation equipment item being associated with a specific equipment control means (10, 20a, 20b, 20c, 30a, 30b, 40, 50), - a device (60; 100) for controlling this home automation equipment item, comprising a touch display and control screen on which a portion of the screen is assigned to the display of a first schematic graphic representation, associated with this equipment item, the control device being separate from the specific control means, characterized in that it comprises: - a step for a selection by the user of a first home automation equipment and a second home automation equipment involved in a scenario, - a step for a first setting of at least one value of a parameter of the first home automation equipment item involved in the definition of the scenario, the first setting being the desired setting on a subsequent execution of the scenario, this step of a first setting being implemented by action on the specific control means so as to cause a phase for modification of the state of the home automation equipment item, and - a step for a second setting of at least one value of a parameter of the second home automation equipment item involved in the definition of the scenario, the second setting being the desired setting on a subsequent execution of the scenario, this step of a second setting being implemented by action of the user on the touch screen of the control device so as to cause a phase for modification of the appearance of the first schematic graphic representation of the home automation equipment item, the first graphic representation being representative of the value of the parameter, and - following the setting steps, a step for saving the parameters values in a scenario memory to be transmitted as setpoints on a subsequent execution of the scenario, and, - a scanning phase including a request step (902, 903) sent by the control device to the first and/or second equipment item for the first and/or second equipment item to reply with information on its state and a step for the detection of the transmission of control commands or control command execution information, the request step being early when the result of the detection step is positive, the scanning phase making it possible to update the first schematic graphic representation. - at least one home automation equipment item (1a, 2a, 2b, 2c, 3a, 3b, 4a, 5a) of a building, the home automation equipment item being associated with a specific equipment control means (10, 20a, 20b, 20c, 30a, 30b, 40, 50), - a device (60; 100) for controlling this home automation equipment item, comprising a touch display and control screen on which a portion of the screen is assigned to the display of a first schematic graphic representation, associated with this equipment item, the control device being separate from the specific control means, - a step for a selection by the user of a first home automation equipment and a second home automation equipment involved in a scenario, - a step for a first setting of at least one value of a parameter of the first home automation equipment item involved in the definition of the scenario, the first setting being the desired setting on a subsequent execution of the scenario, this step of a first setting being implemented by action on the specific control means so as to cause a phase for modification of the state of the home automation equipment item, and - a step for a second setting of at least one value of a parameter of the second home automation equipment item involved in the definition of the scenario, the second setting being the desired setting on a subsequent execution of the scenario, this step of a second setting being implemented by action of the user on the touch screen of the control device so as to cause a phase for modification of the appearance of the first schematic graphic representation of the home automation equipment item, the first graphic representation being representative of the value of the parameter, and - following the setting steps, a step for saving the parameters values in a scenario memory to be transmitted as setpoints on a subsequent execution of the scenario, and, - a scanning phase including a request step (902, 903) sent by the control device to the first and/or second equipment item for the first and/or second equipment item to reply with information on its state and a step for the detection of the transmission of control commands or control command execution information, the request step being early when the result of the detection step is positive, the scanning phase making it possible to update the first schematic graphic representation.