The invention discloses a method and device for nearby washing and storing and long distance micropressure conveying of biogas, and solves the problems that the storage space of an existing biogas pool is limited, conveying is difficult, and the environment is affected. The method for nearby washing and storing and long distance micropressure conveying of the biogas has the characteristics that the micropressure generated by a biogas pool is used; through a normal atmospheric pressure pipeline, the biogas is conveyed to place nearby a user slowly and continuously for a long distance for 24 hours; the biogas is collected and washed and stored for standby application through a micropressure drainage method. The method and the device for nearby washing and storing and long distance micropressure conveying of the biogas has the beneficial effects that cheap equipment is only needed, the problems of conveying and storing of the biogas of the existing large-scale biogas pool can be solved; and the effect of environmental protection is achieved.