Abstract: Based on such indices as the annual mean values of pollutant concentration in atmosphere and the total emissivity of pollutants, the air quality in Shenyang was analyzed briefly with the comprehensive environmental pressure due to air pollutants quantified by ecological footprint. The results showed that the total amount of SO2 was reduced significantly during the past 10 years. However, the total amount of CO2 emission increased rapidly. Characterized by ecological footprints, the comprehensive environmental pressure due to air pollutants were mainly caused by CO2 and SO2. In the period from 1990 to 1994, the footprints of them were about half and half in total footprints. In the period from 1995 to 2000, the proportion of CO2 increased not greatly but, after the year 2000, it increased rapidly even up to 90% in 2005. The facts revealed that the environmental efficiency in economic development characterized by both air pollutant emission and ecological footprint, was improved obviously per unit GDP, and that the influence of the unit GDP offered by economic development on the air quality which is an integral part of ecological environment and its pressure had been weakened.