The invention provides an automobile defrosting air outlet checking method and system, a mobile terminal and a storage medium. The automobile defrosting air outlet checking method comprises the stepsthat when a checking instruction is received, automobile model data are obtained, and defrosting target areas are divided on automobile glass in the automobile model data according to the national standard requirements; defrosting air outlet information is obtained, the air outlet direction is simulated according to the defrosting air outlet information, an air blowing impact point between the airoutlet direction and the automobile glass is calculated, and whether the air blowing impact point is matched with the defrosting target areas or not is judged; when it is judged that the air blowingimpact point is matched with the defrosting target areas, the situation that checking of the defrosting air outlet information in the automobile model data is qualified is determined; and when it is judged that the air blowing impact point is not matched with the corresponding defrosting target areas, the situation that checking of the defrosting air outlet information in the automobile model datais unqualified is determined, and false alarming is sent. According to the automobile defrosting air outlet checking method and system, the mobile terminal and the storage medium, checking determining of a defrosting air outlet can be automatically conducted, manual checking is not needed, the checking efficiency is improved, and checking errors caused by human factors are prevented.