Abstract: Smart home appliance connectivity has developed over the years, but it is still isolated islands, and it is difficult to realize a truly smart life. Exploring the root cause is the lack of a unified system of voluntary access between manufacturers and products. The introduction and application of Harmony OS make the smart home appliance industry see a new breakthrough. Analyzes the interconnection bottleneck of intelligent home appliance industry and the technical architecture of Harmony OS, and compares the core parameters of traditional intelligent home appliance and intelligent home appliance equipped with Harmony OS in network access speed and control convenience through experiments, demonstrates and prospects the arrival of the era of Harmony OS to help all things to integrate.

Key words: Smart household appliances, Harmony OS, Interconnected combination