For the purpose of meeting the demand of goodynamics, geodesy, geophysics and metrology, goophysicists have increasingly attached more importance to absolute and relative gravity survey in recent years, which, as a result, is developing with each passing day. Its observation precision has attained the order of u Gal (1uGal= 10-8m/s2). To ensure reaching such a precision, one must take into account the disturbance or influence of near-instrument bodies. With some practical data, this paper has illustrated this phenomenon and, based on some model calculations, not only deduced related equations but also dealt emphatically with their gravity effects so SB to eliminate or correct these effects.
