The invention provides a method and a system for operating a front windscreen wiper. The method for operating the front windscreen wiper comprises obtaining a front windscreen wiper gear signal, obtaining the speed of a vehicle at the present moment and the speed of the vehicle at the last moment, determining the change state of the speed according to the speed at the present moment and the speed at the last moment, determining the present speed grade according to the speed at the present moment and the change state of the speed, and executing a corresponding operation according to the front windscreen wiper gear signal and the speed grade. Compared with the prior art, the method for operating the front windscreen wiper has better instantaneity and accuracy, and can be implemented automatically by use of a vehicle body network and a vehicle body system without mounting a large number of other devices such as rain sensors, and therefore, the cost is greatly reduced, the service is more intelligent, and the driving stress of a driver in adverse weather is greatly reduced. Besides, in case of a wrong signal and other emergency situations disadvantageous for driving, corresponding measures also are adopted, and therefore, the method and the system for operating the front windscreen wiper are higher in safety coefficient and wider in application range.