A multifunctional critical care system and a method for operating the multifunctional critical care system. A lifting frame is arranged above a bed body (2), a bed board (13) and lifting bands (12) are arranged in the lifting frame, and a tensioning mechanism (11) is arranged on the lifting frame the bed board (13) is provided with plumb lifting mechanisms between which a transverse telescopic mechanism (16) is arranged an upper body tilting mechanism is connected with the lifting frame the lifting bands (12) are buckled on a lifting band buckling unit (15) of a support tube (18), and a plumb lifting power mechanism (7) is started to lift up the lifting frame a transverse telescopic power mechanism (17) is started so that the transverse telescopic mechanism (16) stretches and retracts in a transverse direction a tensioning power mechanism (4) is started to adjust the degree of tension of the lifting bands (12) a drive power mechanism (26) is started to rotate a first support tube (21) around a rotational universal joint (20) under the action of a tilted support column (22), and accordingly, the upper body of a patient can be supported. With the multifunctional critical care system, bed sheet changing, back ventilation, turning over to the left and right, body cleaning and wiping, and defecation and urination can be achieved easily, and painless transfer can be realized by putting a stretcher under the lifting bands (12) the functions of nursing appliances, sickbed and wheelchair are combined in the multifunctional critical care system.Système de soins intensifs multifonctionnel et son fonctionnement. Un cadre de levage est agencé au-dessus dun corps de lit (2) une planche (13) et des bandes de levage (12) sont ménagées dans le cadre de levage et un mécanisme tendeur (11) est disposé sur le cadre de levage. La planche (13) est équipée de mécanismes de levage à plombs entre lesquels un mécanisme télescopique transversal (16) est agencé. Un mécanisme dinclinaison du bu
