Abstract:In order to monitor and evaluate objectively the impact of rare high t emperature and drought on meteorologically driven ecological environment occurr ing in Sichuan Chongqing area in summer 2006.The meteorologically driven ecolo gical assessment index (EMI) model which was established based on the estimate o f the net primary productivity (NPP) was used to calculate the EMI and its rank . The results show that the ecological and meteorological conditions were worse than the perennial summer in the region of Sichuan and Chongqing, and the EMI ra nk was worse or very worse in 33% areas of Sichuan Province and 43% areas of Cho ngqing City. The worse area of EMI of Sichuan and Chongqing in June and August w a s larger than that in July. In different ecosystems, the EMI of city and town wa s very worse, and the EMI of cropland and grass and shrub land was obviously wo rse, but the EMI of woodland was nearly normal. The ecological effect of drought is reversible, and it can be restored after the weather condition improved the ecosystems service function. Therefore the effective measures should be adopted to restore the ecosystem service functions and to decrease greatly the various o f the loss.