With the development of 5G technology and distributed computing, the Internet of Things (IoT) for electric power shows excellent potential in realizing efficient and secure energy management. The objective of this study is to investigate how 5G communication technology can be combined with distributed computing to enhance the performance of power IoT. This paper examines the power of IoT technology that integrates 5G communication and distributed computing. The study is designed to enhance the power system’s efficiency and security. Through experiments and simulations, this study utilizes 5G technology to optimize IoT communication while using distributed computing to enhance data processing. According to the results, the integrated system improves the data transfer rate by 50% and reduces the potential security risk by 25%. The conclusion demonstrates that combining 5G and distributed computing can significantly enhance the efficiency of power IoT, which is crucial for the construction of future smart grids.