Seat safety device treating method and system

This invention relates to a process method for safety equipments of seats of cars and a system including: A, getting the pressure signal of a sensor, B, operating relatively according to the pressure value expressed by the pressure signal and its set threshold value, B1, if the pressure value is greater than or equal to the threshold value, it is determined that the seat is occupied to start up the safety device, B2, if the value is smaller than the threshold value, it is determined that it is not occupied and the safety device is closed, the system includes a seat safety device, a sensor and an identifying module, in which, the sensor collects pressure signal of the seat and transfers it to the identifying control module, which computes related pressure value according to the signal and emits related control signal to the safety device of the seat according to the pressure value and the threshold value.