NOVELTY - A system and a method for advanced treatment of nitrogen and phosphorus by using microorganisms and membrane are provided to prevent the membrane from being clogged and inhibit large manpower and high cost from being consumed in treatment of raw sludge when performing advanced treatment of wastewater by using the membrane.    DETAILED DESCRIPTION - A system for advanced treatment of nitrogen and phosphorus by using microorganisms and membrane comprises: a settling and separating tank(10) for settling raw sludge contained in wastewater; a flow equalization tank(20) connected to the settling and separating tank; an anaerobic tank(30) which is connected to the flow equalization tank, and from which phosphorus is released; an anoxic tank(40) which is connected to the anaerobic tank, and in which denitrification is performed; an aerobic tank(50) which is connected to the anoxic tank, and which decomposes carbon compounds into carbon dioxide and water and decomposes nitrogen compounds into ammonia and nitrates; a nitrification tank(60) connected to the aerobic tank to nitrify ammonia nitrogen, remove phosphorus released from the anaerobic tank by excess digestion, oxidize organic matters and return a portion of treated water to at least one of the anaerobic tank and the anoxic tank; a sedimentation tank(70) connected to the nitrification tank to subject treated water to solid-liquid separation by gravity, overflow supernatant only and return settled sludge to at least one of the settling and separating tank, the flow equalization tank, the anaerobic tank and the aerobic tank; a membrane filter tank(80) connected to the sedimentation tank to subject excess sludge and treated water to solid-liquid separation using a membrane and return excess sludge to at least one of the settling and separating tank and the aerobic tank; and a disinfecting and discharging tank(90) connected to the membrane filter tank to utilize a portion of the disinfected water as backwashing water and discharge the residual disinfected water after disinfecting treated water.