Due to the diversity and complexity of the pollution situation of domestic urban air environmental quality,many evaluation methods for air quality doesn’t appear to be fully suitable,especially they can not quickly acquire the data for processing.The PROMETHEE method was introduced to give the sample a comprehensive assessment according to the national air quality rating standard,and the theory of information entropy was presented to calculate the weight of each evaluation index for determining the weight values without subjectivity.Finally,an atmospheric quality evaluation model using method of PROMETHEE based on entropy weight was established.The analysis results by the model can basically correspond to the fact,and make the calculation of the data processing easier,demonstrating the reliability and applicability of the established model and method.