Abstract: A view definition enhancement system for gastrointestinal endoscope diagnosis and treatment (ESCGV) comprises a washing bottle (1) and a liquid delivery pipe (2) led out from the washing bottle (1). The liquid delivery pipe (2) pumps washing liquid to a liquid inlet system of a gastrointestinal endoscope or an observation window of the gastrointestinal endoscope through a first peristaltic pump (3); and the washing bottle (1) is further provided with a stirring and heating subsystem capable of stirring and heating the washing liquid. A view definition enhancement method for gastrointestinal endoscope diagnosis and treatment comprises steps of: 1) adding the washing liquid into the washing bottle (1); 2) magnetically stirring the washing liquid in the washing bottle (1), and heating the washing liquid at the same time; 3) setting the temperature of the washing liquid to 25-38° C.; and 4) delivering the washing liquid into the observation window of the gastrointestinal endoscope.