Emergency vehicle way-giving reminding method and system

The invention discloses an emergency vehicle way-giving reminding method. The method comprises the following steps: S1, acquiring remote vehicle information and own vehicle information in real time; s2, analyzing the acquired remote vehicle information, and screening out emergency vehicles whose emergency states are activated; s3, judging whether the vehicle and the screened emergency vehicle run in the same direction or not, and judging whether the screened emergency vehicle is located on the same lane behind the vehicle or not; when the two conditions are met, remote vehicle information of the emergency vehicle is stored; s4, screening out preferential way-giving vehicles; s5, calculating the arrival time and distance of the preferential way-giving vehicle, and determining a dynamic distance threshold value of early warning according to the speed of the preferential way-giving vehicle; and S6, outputting an early warning signal according to the vehicle distance and the early warning dynamic distance thresho