In order to make full use of meteorological information and to improve the safety index of the carrier aircrafts, based on an objective analysis for the features and advantage of meteorological information, a safety evaluation model was put forward for the use of carrier aircrafts under pure marine meteorological background. The model was composed of two parts, namely taking off & landing safety index and the round-trip safety index. the main relevant factors and evaluation method were given according to the practical use, including the fitting formulas. For the taking off & landing safety index, a judge matrix was used to determine the weight of different meteorological factors, a new concept "objective meteorological index" and it′s way of calculation were firstly put forward, then, the taking off & landing safety index can be calculated by the way of linear weight adding. For the round-trip safety index, the main calculation method was focused on the covering effect for the aircrafts of clouds and fog.