To investigate the eco-environmental destruction in the Dachang and Gaolong mines in Guangxi, the authors used Quickbird-2 & SPOT-1 remote sensing technology. It is known from the study that the fusion image formed by band 1,4,2 or 2,4,1 and band Pan of Quickbird-2 is effective in recognizing different ecological environments of the mines. Therefore, the technology can be applied to environmental investigation on the large scale and also at the 1-meter-level scale. The fusion image formed by band Pan of SPOT-1 and band 7,5,4 of Landsat-7 ETM⁺ can be applied to environmental investigation on the medium-large scale and also at the 10-meter-level scale. On such a basis, this paper further discusses the effects of the eco-environmental destruction in mines on the whole ecological system of the earth.