Abstract: Demand response（DR） has been considered a serviceable way of demand side’s contributing to raising the flexibility of the electric power grid. Integrated demand response（IDR） is seen as the derivative of DR in the context of multi-energy network which utilizes the complementary relationships among different energy forms like gas, electricity, cold and heat. By co-optimizing at the consumer end, IDR will increase the efficiency of energy utilization and fully explore the flexibility of multi-energy network, which in turn lowers the cost of both the energy suppliers and consumers. Firstly, the basic concept of IDR and its framework was introduced. Secondly, the model of IDR at the consumption side was given, the overview of optimal operation model and its solving method were presented. Finally, the key scientific issues and the future research directions related with IDR were discussed.