A 
sewage treatment process is provided, which includes the following steps: a) 
sewage feeding step, comprising introducing raw 
sewage into a 
biological reaction tank (1) to a predetermined time or liquid level; b) 
reaction step comprising performing 
aeration and stirring intermittently in the 
biological reaction tank (1); c) 
treated water discharging step, comprising performing 
solid-liquid separation of the mixed liquor in the 
biological reaction tank (1) by a membrane separation device (2) to obtain a first permeate, which is taken as the final 
treated water; d) standby step comprising stopping 
aeration in the biological reaction tank (1); and e) 
phosphorus-enriched water discharging step, comprising keeping anaerobic condition in the biological reaction tank (1) and performing 
solid-liquid separation of the mixed liquor in the biological reaction tank (1) by a membrane separation device (2) to obtain a second permeate, the second permeate entering inside a 
phosphorus recycling unit (5) which is set independent from the biological reaction tank (1), the 
phosphorus recycling unit (5) removing phosphorus from water, the second permeate becoming low-phosphorus water, and the low-phosphorous water flowing back to the biological reaction tank (1); the 
sewage treatment process runs in cycle by repeating above steps. A corresponding 
treatment system is also provided.