In the context of the "Internet+" era, vehicle networking is an inevitable trend. In vehicle networking, V2X (Vehicle-to-Everything) is a key technology that focuses on achieving information exchange between vehicles and their external environment. The implementation of active safety applications relies on this V2X technology, which can realize truly meaningful active safety applications through the "interconnection" among network platforms, vehicles, and the driving environment. Based on this, this project will research the construction of a V2X system platform architecture and demonstration of active safety applications. The main research content includes: The V2X system architecture revolves around three main parts: the onboard end, the roadside end, and the backend server. The onboard end judges scenarios and provides alarms; the roadside end mainly digitizes road information and provides it to vehicles; the backend server mainly manages the roadside end and stores various types of data. Through the coordinated work of these three parts, Not only can it significantly reduce the incidence of traffic accidents, but it can also effectively alleviate traffic congestion. The active safety application demonstration system based on V2X mainly includes overspeed alarm, front collision warning, reverse overtaking warning, lane change warning, speed guidance, red light violation alarm, road construction reminder, etc. By installing relevant V2X devices on vehicles and realizing the value of these applications based on the V2X system platform, and conducting demonstration operations, it promotes coordinated development of technology and industry. Since the architecture of the V2X system platform and the equipment required for the active safety application demonstration system involve enterprises from multiple fields such as automotive parts manufacturers, communication chip manufacturers, software providers, etc., the promotion of V2X architecture and active safety applications can drive the integrated development of two pillar industries, automotive and communication, further expanding their market potential and development space.