NOVELTY - Wastewater processing method, involves using wastewater processing device. The device comprises anaerobic bath, preaerobic bath, post anaerobic bath, transfer pump, flow rate shock-absorbing distribution tank, aerobic submerged membrane bath, separation membrane device, residual sludge pulling pump, first transfer line, and second transfer line. The anaerobic bath includes a mixer. The separation membrane unit includes a separation unit having several separation membrane modules and filtering pump.    USE - Wastewater processing method.    ADVANTAGE - The organic compounds, suspended materials, nitrogen and phosphorus contained in wastewater are removed efficiently and cost-effectively, with increased nitrification and denitrification efficiency. The productivity of sludge is reduced.    DETAILED DESCRIPTION - Wastewater processing method, involves using wastewater processing device. The device comprises anaerobic bath (20), preaerobic bath (30), post anaerobic bath (40), transfer pump, flow rate shock-absorbing distribution tank (60), aerobic submerged membrane bath (50), separation membrane device, residual sludge pulling pump (160), first transfer line (80), and second transfer line (90). The anaerobic bath includes a mixer (100). The separation membrane unit includes a separation unit (130) having several separation membrane modules and filtering pump (150). The residual sludge pulling pump removes the absorbed phosphorus while maintaining concentration of microbial mixed liquor. The first transfer line transfers a portion of the microbial mixed liquor to the preaerobic bath, and the second transfer line transfers a portion of the microbial mixed liquor to the anaerobic bath. An INDEPENDENT CLAIM is included for wastewater processing device.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of the wastewater processing device. (Drawing includes non-English language text)    Anaerobic bath (20)    Preaerobic bath (30)    Post anaerobic bath (40)    Aerobic submerged membrane bath (50)    Flow rate shock-absorbing distribution tank (60)    Transfer line (80,90)    Mixer (100)    Separation unit (130)    Filtering pump (150)    Residual sludge pulling pump (160)