As an important way to improve energy efficiency, IES plays a key role in promoting sustainable development of energy. In order to optimise the regulation effect of hydrogen storage IES, from the perspective of electrothermal coupling, the optimisation regulation model of hydrogen storage IES was constructed, and its effectiveness was tested. The results show that under this control strategy, the consumption of wind power, photovoltaic power, and hydrogen power generation is maintained in the range of 2,500-3,500 kWh, 1,500-2,500 kWh, and 3,500-4,500 kWh, respectively. Compared with the control strategy without considering the electric heating coupling, the coal consumption per unit time under this method is reduced by 40-80 J. This shows that the regulation method has improved the consumption of clean energy, greatly reduced coal consumption and economic costs, improved the utilisation rate of clean energy, optimised the regulation effect of IES, and is conducive to promoting the development of renewable energy.