Abstract: The interdependency of electricity and natural gas may limit the operational fi exibility of the integrated electricity and natural gas system（IENGS）and consequently prevent wind power from being integrated. This article aims to solve the problem by incorporating the demand-side fiexibility of energy hubs into the scheduling issue of the IENGS. To fully exploit the demand-side fi exibility,the detailed integrated demand response（IDR）model is developed for the EHs. Unlike the traditional demand response programs in which only elastic electricity demand is considered,both electricity demand and natural gas demand are considered fi exible and controllable in the IDR. Moreover,the IDR is modeled as an optimization issue rather than a price-responsive load bid. The interactions between the ERs’ IDR model and the IENGS’scheduling model are achieved based on the two-level optimization framework.Furthermore,the IDR-embedded scheduling of the IENGS is formulated as a complicated two-level mixed integer nonlinear programming（TL-MINLP） problem. An effective method is proposed to solve the TL-MINLP problem efficiently to enable the IDR-embedded scheduling model to be used in the engineering practice. The case study has verified the benefits of the proposed IDR-embedded scheduling method.