Recently, electrogastrography (EGG) has received more and more attention. While gastroenterologists are interested in its clinical applications, concerns remain regarding the reliability and analysis of the EGG and the correlation between the EGG and gastric motility. The aims of this paper are to address these concerns and to review the potential clinical applications of the EGG. The following areas are discussed, based on the literature and our own experience with EGG: the refined method for the measurement of the EGG, the advanced techniques for quantitative analyses of the EGG, the reliability of the EGG in measuring gastric myoelectrical activity, the correlation between the EGG and gastric motility, and applications of the EGG in clinical gastroenterology.