The invention mainly relates to a motor vehicle curve driving assistance system and an operation type. The motor vehicle curve driving assistance system mainly comprises a frontend camera device, an image and data processor, a GPS (global positioning system) positioning device, a vehicle speed detection device, a wheel steering angle detection device, a vehicle-mounted multimedia display device and a system control processor, and is based on an image processing technique. The image and data processor of the system is used for determining whether a motor vehicle enters a curve or not through judging whether a complete obstacle background type exists in the driving road image of the motor vehicle or not, and analyzing and computing to obtain the site curvature radius data K. The motor vehicle curve driving assistance system has the advantage that when the motor vehicle approaches and drives through the curve, the related curve data and driving suggestions are accurately prompted to the driver through the multimedia display device, the driver, especially the primary driver, is assisted to safely and smoothly pass through the curve road, and the possibility of traffic accidents at curve is decreased.