The study considers some fundamentals of ecological geomorphology of Eurasian Arctic shelf and analyses the system-morphological methodology in investigation and mapping of seabottom relief. Such approach provides a forecasting of the main «traps» for bottom sediments and, subsequently, polluting substances. The elaborated scheme of the geomorphologic zoning of Eurasian shelf takes under consideration the principle distinction between geologic structures of its western and eastern sectors and contains an appraisal of geoecological positions of some sea oil and gas fields.