NOVELTY - The device for continuous production of hydrogen and oxygen gas by sequential electrolysis of an aqueous medium, comprises n number of unit cells of electrolysis electrically connected together, where n is 8-256, an aqueous medium to be decomposed in which each pair of electrodes of opposite polarity is partially immersed, p number of subcells, where p is greater than 2, n number of free spaces between n pair of electrodes of opposite polarity or gaps in which gas evolution takes place, a collection area for evolution of gas, and a unit for extracting the evolution gas.    USE - The device is useful for continuous production of hydrogen and oxygen gas by sequential electrolysis of an aqueous medium for producing renewable and clean fuel gas supplied for burners of a boiler and heat engines for electricity production and vehicles (claimed).    ADVANTAGE - The device ensures automatic, safe, economical, continuous and real-time production of hydrogen and oxygen gas by sequential electrolysis of an aqueous medium without creating any pollution to the environment.    DETAILED DESCRIPTION - The device for continuous production of hydrogen and oxygen gas by sequential electrolysis of an aqueous medium, comprises n number of unit cells of electrolysis electrically connected together, where n is 8-256, an aqueous medium to be decomposed in which each pair of electrodes of opposite polarity is partially immersed, p number of subcells, where p is greater than 2, n number of free spaces between n pair of electrodes of opposite polarity or gaps in which gas evolution takes place, a collection area for evolution of gas, a unit for extracting the evolution gas, a feeding area in an aqueous medium, and an electrical energy source and a supplying unit by that electrical energy delivering a direct electrical current to each cell under an intensity and voltage. Each of n cells comprises two coaxial electrodes of opposite polarity, of which cathode (5) acts as the internal electrode on the outer surface, which is created and releases hydrogen gas as bubbles and anode (4) acts as the external electrode on the inner surface and releases oxygen gas in the form of bubbles and an external housing (6) coaxial with the electrodes. The n cells are located in the bottom of the device provided with a supplying unit by electrolytic aqueous medium. The electric current passes from the anode to the cathode by the aqueous electrolyte medium. Each of n electrolysis elementary cells comprises gas collection areas. A system is arranged for managing the device by electronic sequencing guided by artificial intelligence and by receiving information from the sensors/transmitters. A unit is arranged to activate and optimize the production of the hydrogen and oxygen gas mixture and regulating the production according to the downstream demand. The management system guided by artificial intelligence is equipped with a computer to manage online and real time. The operating parameters of the device, the information and data obtained from the device are fed to the device during operation by software, algorithm and groupware. The management system is performed at frequencies of 1 Hz to 4 MHz, a continuous current of up to 50 A or a direct electric current of 20 A and a voltage of 12 V, 24 V, 36 V and 48 V. The angle alpha and angle beta for cathode and anode are 1-15 degrees , and the walls of the cathode and anode are parallel to each other and diverge from each other from the base of the unit cell to its top. The free space defined between the cathode and anode of each unit cell of electrolysis is adjustable in thickness with axial downward or upward horizontal movement one of the two electrodes with respect to each other. The thickness of the gap is 0.2-5 mm. A unit is arranged with the device for selective physical separation of hydrogen and oxygen.    DESCRIPTION OF DRAWING(S) - The diagram shows a vertical cross-sectional view of an elementary cell.    Anode (4)    Cathode (5)    External housing (6)    Aqueous medium (7)    Gap between the free spaces. (8)