The Horses were the main transportation and communication tools, The Post and Proclamation carrier administrated and dispatched the horse management, and ensured the normal operation of The State institutions in the Early Period of the Tang Dynasty. The central and local government institutions of The horse management has subordinated of relationship in the Early Period of the Tang Dynasty. The Horse administrative houses and the car administrative houses in northwest border areas, has subordinated relationship with the central official Subordination. The State (government), Subordination town, county, Shu has subordinated relationship, The Assult-resisting Garrison has the support tasks, in addition to obey the state's command, but also co-ordinated with the town. The horse administration was the indispensable military in the border logistics, not only the key point maintained the running regime, but also established the great value on the transport position in the Early Period of the Tang Dynasty.