A new traffic information collection and detection system based on linear CCD is designed and realized. The system extracts traffic parameters such as license plates, vehicle existing, vehicle speed, vehicle type, traffic occupancy, flow rate and so on, using linear images of vehicles passing the detection section collected by linear scan CCD camera. And it can transmit required data to the monitoring center using TCP/IP protocols. Compared with traditional video detection systems, the system has the advantages of high real-time, accurate detection and abundant functions. And it achieves a good performance in engineering applications.