This paper delves into the application of the open-source Harmony Operating System (Harmony Operating System) in the fields of IoT intelligence and transportation, thoroughly analyzing the underlying connectivity technology features of the Harmony Operating System architecture. The results indicate that in-depth exploration of the Harmony Operating System architecture can be researched from the following aspects: distributed soft bus technology, distributed data management, distributed task scheduling, distributed security mechanisms, distributed device virtualization, efficient network protocol stack, automatic discovery and configuration, and low-power design. These technical features significantly enhance the connectivity, data processing capability, and intelligence level of the system, providing a solid technical foundation and broad development prospects for intelligent applications in IoT and transportation fields.