With the wireless communication network and location data, the existing telematics system provides various information services such as navigation, emergency service, and etc. In addition, it collects and exploits vehicle status through in-vehicle sensor network such as CAN and LIN [1]. In this paper, WSN-based intelligent telematics system is presented that connects the telematics system and sensor network within the vehicle to the wireless sensor network (WSN) constructed on the road. It provides vehicles with the more intelligent real time services such as environment information on the road, car accident alarm and etc.