The invention relates to a gas, breeding and water quality purification integrated operation system in the environment treatment field, which comprises the following steps: sending the organic carbon sewage produced in the production and life to the sterilization and disinfection treatment tank in order to sterilize and disinfect; making 80%-90% separated organic clean water inflow the biological breeding clarification tank or irrigate the plants directly in the sewage separating procedure; making 10%-20% concentrated organic slag liquid from the separating procedure and the organic waste inflow the quick-speed etch tank for two or three days; sending the separated etch gas to the sterilization and disinfection treatment tank; sending the etched organic concentrated material to the reaction storage in order to produce the methane by anaerobic reaction; sending the rest organic slag liquid to the slag water separating procedure; using the separated solid organic slag fertilizer in the other places; sending the slag liquid to the biological breeding clarification tank or irrigate the plants directly. The system is fit for the waste and sewage treatment and the environment protection in the city and country tourist resort.