Based on China's guangxi guilin for a hernia operation in 1 to 3 years old preschool children propofol and etomidate on behavioral and cognitive function after intravenous anesthesia in according to beta protein in serum and plasma glutamate (Glutamic acid, Glu) and gamma-aminobutyric acid (Gamma aminobutyric acid, GABA) level of observation, the rapid development period children's cognitive function after anesthesia short-term and long-term change process and its possible mechanism is studied, for the current international debate on "anesthetics effects on developing kids brain nerve" research hot spot in the city of clinical basis and research argument, for pediatric anesthesia clinical safety, provide theoretical basis for the rational use of drugs.