With the rapid advancement of China’s new-type power system, renewable energy has become the dominant supply source, while demand-side loads are rising sharply and exhibiting increasingly pronounced peak characteristics. This temporal mismatch between generation and consumption poses significant operational challenges. Electric vehicles (EVs), with their distributed energy storage potential, scalability, economic viability, and controllability, are emerging as critical resources for enhancing renewable energy utilization and maintaining grid stability. This paper systematically reviews the evolving role of EVs in securing power supply, stabilizing electricity prices, and facilitating the low-carbon transition. It synthesizes international and domestic practices in modeling EV functions and implementing pilot integration projects within modern power systems. To support effective vehicle-grid integration, three key capabilities are identified: quantified energy transaction capacity, rapid load dispatching ability, and seamless intelligent interaction. Drawing from regional pilot programs and policy frameworks, the paper proposes a coordinated development pathway across four dimensions: platform collaboration, user-side incentives, dispatch mechanisms, and standardization. The study underscores the potential of EVs as flexible demand-side assets that can enhance grid resilience and accelerate the transition to a sustainable energy future.