Welding and/or cutting system comprising: - a generator, - a connection element, - a welding and/or cutting unit suited to be connected to said generator through the connection element, - a protection unit comprising a protection screen that can be darkened, and - a control system suited to be connected to said generator, said control system comprising first transmission/reception means of the Bluetooth ® type cooperating with said protection unit and/or with said protection screen in order to control the darkening of said protection screen, characterized in that the welding and/or cutting system further comprises a microprocessor, and the welding and/or cutting system further comprises a data collection/transmission unit, wherein the data collection/transmission unit comprises sensors (41, 42, 43, 15) included in the connection element and a data collection/transmission system, included in the control system, receiving data from the sensors (41, 42, 43, 15) through the microprocessor, wherein the sensors (41, 42, 43, 15) are configured to supply the data system with data concerning any of a wire speed, flow rate of gas, welding voltage and temperature of a liquid circulating in a cooling circuit, and in that said first transmission/reception means are suited to exchange data collected by the data collection/transmission system with any device of the Bluetooth ® type, both inside the welding system, for example another transmission/reception means of the Bluetooth ® type, and outside the welding system, for example a PC, a tablet or a similar device. - a generator, - a connection element, - a welding and/or cutting unit suited to be connected to said generator through the connection element, - a protection unit comprising a protection screen that can be darkened, and - a control system suited to be connected to said generator, said control system comprising first transmission/reception means of the Bluetooth ® type cooperating with said protection unit and/or with said protection screen in order to control the darkening of said protection screen, characterized in that the welding and/or cutting system further comprises a microprocessor, and the welding and/or cutting system further comprises a data collection/transmission unit, wherein the data collection/transmission unit comprises sensors (41, 42, 43, 15) included in the connection element and a data collection/transmission system, included in the control system, receiving data from the sensors (41, 42, 43, 15) through the microprocessor, wherein the sensors (41, 42, 43, 15) are configured to supply the data system with data concerning any of a wire speed, flow rate of gas, welding voltage and temperature of a liquid circulating in a cooling circuit, and in that said first transmission/reception means are suited to exchange data collected by the data collection/transmission system with any device of the Bluetooth ® type, both inside the welding system, for example another transmission/reception means of the Bluetooth ® type, and outside the welding system, for example a PC, a tablet or a similar device. said control system comprising first transmission/reception means of the Bluetooth ® type cooperating with said protection unit and/or with said protection screen in order to control the darkening of said protection screen, characterized in that the welding and/or cutting system further comprises a microprocessor, and the welding and/or cutting system further comprises a data collection/transmission unit, wherein the data collection/transmission unit comprises sensors (41, 42, 43, 15) included in the connection element and a data collection/transmission system, included in the control system, receiving data from the sensors (41, 42, 43, 15) through the microprocessor, wherein the sensors (41, 42, 43, 15) are configured to supply the data system with data concerning any of a wire speed, flow rate of gas, welding voltage and temperature of a liquid circulating in a cooling circuit, and in that said first transmission/reception means are suited to exchange data collected by the data collection/transmission system with any device of the Bluetooth ® type, both inside the welding system, for example another transmission/reception means of the Bluetooth ® type, and outside the welding system, for example a PC, a tablet or a similar device.