Self-adaptive combined control type sewage treatment system and method

The invention provides a self-adaptive combined control type sewage treatment system and method. The system comprises an inlet end monitoring unit (1), an outlet end monitoring unit (2), a combined control unit (3) and a controlled combined body (4), the controlled assembly (4) comprises a first inlet end (41) and a second outlet end (42); the inlet end monitoring unit (1) monitors a first flow velocity value of sewage entering the controlled assembly (4) through the first inlet end (41); the outlet end monitoring unit (2) monitors a second flow velocity value of the sewage flowing out of the controlled assembly (4) through a second outlet end (42); the controlled combination body (4) comprises a plurality of combinable sewage trickling filtration devices (43); and the combination control unit (3) controls the combination state of the plurality of combinable sewage trickling filtration devices (43) of the controlled combination body (4) on the basis of the first flow rate value and/or the second flow rate val