This paper deals with the biogeochemical properties of gold deposit, biogeochemical effects on plants and the characteristic of the spectral reflectance and remote sensing image, and the abstraction methods of specialized information of extracting the abnormal feature of biogeochemical effect using remote sensing image processing. The results prove that Au and associated elements were intensely absorbed and accumulated by plants in the gold mining area. The plants in the area have been evidently poisoned by Au and associated elements. Excessive absorption of Au and associated elements makes that the contents of chlorophyll, carotenoid and water of leaf, and leaf surface temperature are lower than the background values. The cell structure and tissue of leaf variared in the gold deposit area. The spectral characteristics of leaves of plants are obviously different. The images of remote sensing show the abnormal characteristic information on spectra of leaves. These evidences can be used as the indicators of gold biogeochemical remote sensing for exploration of concealed gold deposit in vegetable area. The gold mineralized areas are exemplified to explain how to extract abnormally information related to gold mineralization from remote sensing and biogeochemical survey, and some applied examples of prospecting for ore deposits were given in the paper. At the same time, some research fields both in theory and application of remote-sensing biogeochemistry have also been emphasized, and the fast and effective methods of prospecting for deposits have been explored in the vast vegetation regions.