Abstract: The deployment of demand response edge computing node can alleviate the pressure of demand response management platform to deal with massive services, and improve the quality of management in users' terminals. However, in practical engineering applications, the utilization of edge computing mainly focuses on characteristic of real-time instead reliability in services. This paper paid attention to the reliability of services when applying the technology of edge computing. A deployment method for demand response edge cloud with considering services reliability was proposed. Deployment method contains novel communication and task assignment mechanism. By establishing a new demand response communication mechanism and choosing location to deploy the edge node, the impact of link failure and poor communication quality in network was reduced. In case of link failure and poor communication quality, demand response service was switched between distributed and centralized control modes. In order to select the deployment location of edge nodes, exhaustive method was applied in this paper to meet the specific requirements. Meanwhile, when the result of edge node selection was obtained, a corresponding task assignment mechanism of demand response services between edge nodes was designed. Proposed mechanism assigns services to edge nodes one by one. It is realized by a proposed heuristic algorithm, which can make the difference of load controlled by the edge node will not be too large. The simulation results show the effectiveness of proposed communication mechanism and task assignment to improve the reliability of demand response services.