The present invention relates to a method and a device for managing energy consumption and, more particularly, to a method and a device for managing energy consumption for each time period so as to support a user's achieving of a target energy consumption rate for a predetermined time period. In addition, disclosed is a technology for a sensor network, machine to machine (M2M) communication, machine type communication (MTC), and the Internet of Things (IoT). The present disclosure can be utilized in an intelligent service (such as smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety-related services) based on the technology.