The development of electricity to gas technology alleviates the phenomenon of abandoning wind and light, and strengthens the coupling between power grid and natural gas network. On the premise of safety, the produced hydrogen is mixed into the natural gas pipeline network for long-distance transportation, which makes the natural gas network become a porter of renewable energy, fully alleviates the contradiction between energy supply and demand in time and space, and improves the energy utilization rate and system economy. In this paper, the economic analysis model of hydrogen doped electricity gas integrated energy system is established. Taking a certain electricity gas integrated energy system in Central China for an example, the economy performance of the system under different hydrogen blending ratio is analyzed compared with the local hydrogen storage system with different hydrogen storage capacity. The results show that both hydrogen blending and local hydrogen storage can improve the economy performance of the system, and the benefit of hydrogen blending is better than that of local hydrogen storage, but hydrogen blending leads to the increase of the cost of power grid side and the benefit of gas network side at the same time. In actual operation, it is necessary to comprehensively consider the gas price pricing strategy and the gas network structure of the system in order to select the best maximum hydrogen blending ratio, so as to achieve the optimal economy of the system.