Abstract: The aggregate resource-environmental pressure and efficiency of a regional economy were presented. The resource-environmental pressure and efficiency of Shenyang from 1991 to 2005 were studied empirically. The results showed that the aggregate resource-environmental efficiency of Shenyang's economy increased by 7.4% at a year, and its efficiencies on the input and output sides increased by 8.1% and 11.4% at a year, respectively. This means that the environmental pressure (especially on the output side) per unit of economic output decreased at a relatively high speed. This is a great achievement for Shenyang in view of the fact that its economy is at a stage of fast industrialization. However, the environmental pressure increased by 11% at a year after 2000. About 60%~70% of the total pressure is from the output end and about 85%~97% of the output pressure is caused by CO2 emission from energy consumption.