New energy and intelligent network bring more abundant electrical functions to automobiles, and the requirements for electrical architecture development are also increasing. Many requirements for meeting the flexible expansion of the platform, reducing development costs, and improving product services have also increased. Then the building-scale distribution domain architecture, intelligent and flexible software upgrades, intelligent network interconnection services, and targeted development and testing procedures will be the requirements that must be met in the future development of automotive electrical system architecture. Brilliance Auto R&D Center (BARC) will discuss on the future architecture design of vehicle electrical system.