The invention provides a driving behavior assessment method. The driving behavior assessment method comprises the steps that 1, according to collected information, driving behaviors are judged into the following six conditions of whether drunk driving or not, whether fatigue driving or not, whether attention focusing or not, whether furious driving or not, whether frequent lane changing or not and whether intense driving or not; 2, the driving behaviors of the six conditions are set into preset weighted values, in driving circulating of preset times, according to judged results of the six conditions, the set preset weighted values in the driving behaviors of the six conditions are overlapped and calculated to obtain a result; and 3, when the obtained result is located in a first section, the driving behaviors of a driver are judged to be good, when the obtained result is located in a second section, the driving behaviors of the driver are judged to be ordinary, and when the obtained result is located in a third section, the driving behaviors of the driver are judged to be bad. According to the driving behavior assessment method, extraction of driving characteristics of the driver is achieved, and driving behavior assessment is conducted through driving characteristic data.