The invention relates to a system for calculating the service life of an air conditioner filter and a calculation method thereof. The system includes an air conditioner controller used to obtain parameters of different working conditions of the air conditioner filter. The air conditioner controller is respectively connected to an air conditioner box, a humidity sensor, Ambient temperature sensor, air quality sensor, and gateway control unit. The air-conditioning box is equipped with air-conditioning filters, blowers, and internal and external circulation dampers. The parameters obtained by the air-conditioning controller include the start-up time of the blower, the external cycle time of the air conditioner, and the time of various environmental conditions. and vehicle mileage. The present invention can calculate the service life of the air-conditioning filter according to information such as different user's car environment, road conditions, car frequency, ambient temperature and humidity, inform the user in advance, and allow the user to replace it in time, thereby ensuring the air-conditioning effect and good air quality in the car , And avoid frequent replacement and increase maintenance costs.