Schizophrenia is the most common type of mental illness characterized by changes in basic personality, split thinking, emotion, and behavior, and incoordination between mental activities and the environment. Schizophrenia is the most common group of mental illnesses. Survey data from six districts in the United States show that its annual incidence rate is 0.43‰ to 0.69‰, and 0.30‰ to 1.20‰ for those over 15 years old (Babigian, 1975). In some parts of my country, it is 0.09‰. According to the International Schizophrenia Pilot Survey (IPSS), 20 centers in 18 countries have surveyed more than 3,000 people for more than 20 years. The annual incidence rate of schizophrenia in the general population is between 0.2‰ and 0.6‰, with an average of 0.3‰ (Shinfuku, 1992).