Ubiquitous power Internet of things is the specific manifestation and application of ubiquitous power industry Internet of things. This paper expounds the architecture of ubiquitous Internet of things: perception layer, network layer, platform layer and application layer, and analyzes the inseparable, complementary and deep integration relationship between ubiquitous Internet of things and smart grid. Secondly, the key technologies of ubiquitous power Internet of things are discussed from the aspects of intelligent perception technology, edge computing technology, space-space integration network technology, cloud computing technology, artificial intelligence technology, safety protection technology, Internet of things joint modeling and simulation technology, etc. Finally, the application scenarios and practical preconceptions of the ubiquitous power Internet of things are studied.