The embodiment of invention provides a smart integrated MBR sewage purifying device. The device comprises an oxygen deficit pool, an aerobic pool, a membrane pool, a clear water pool and an equipmentroom. The oxygen deficit pool is communicated with the bottom of the aerobic pool, the aerobic pool is communicated with the top of the membrane pool, the clear water pool and the membrane pool are not communicated in the same pool, and the equipment room is next to the clear water pool and comprises a phosphorous removal system, a back flush system, a sterilizing system and an electric control cabinet; the oxygen deficit pool primarily filters sewage, a denitrification reaction occurs, the sewage has the denitrification reaction through the aerobic pool to generate nitration liquid, the membrane pool performs deep-layer filtering through an MBR membrane device and is connected with the phosphorous removal system to remote phosphorous in the sewage, and the clear water pool is connected with the sterilizing system to sterilize produced water by the membrane pool, so that clear water is obtained. By the adoption of the modularized design, the production period is controllable, quality is good, the structure is compact, the size is small, transportation and installation are simple, full-automatic operation can be realized, remote monitoring can be realized, and the demand for treating the sewage in villages and small towns can be met.