The power internet of things is one of the key technologies to establish a new-type of power system with new energy as the main power source. As a successful case of internet of things technology with energy and information fusion, PLC-IoT can use existing power line resources for data transmission and improve the deep perception of power grids. It is suitable for use as the communication method at the power internet of things network layer and can promote deep integration of the power grid and communication network. This paper first introduces the current development of the power internet of things, analyzes the feasibility and key issues of the internet of things technology with energy and information fusion, and discusses the application scenarios and development directions of PLC-IoT in the power industry by analysis of its key technologies and application advantages. Finally, a vision of establishing a universal multi-energy flow and multi-channel ubiquitous energy internet of things is proposed. This work is supported by the Key Program of National Natural Science Foundation of China (No. 51937005).