Disclosed is an artificial heart and lung apparatus (100) that can be connected to a patient (P), and transfers removed blood to a human body via a roller pump (120), the system including: the roller pump (120); a blood removal line (101) which transfers removed blood to the roller pump (120); a first blood transfer line (104) that transfers blood, which is transferred from the roller pump (120), to the human body; a blood removal rate sensor (111) that is provided in the blood removal line (101); and a control unit (140), in which the control unit (140) performs control such that a blood transfer rate of the roller pump (120) is in a specific range with respect to a blood removal rate measured by a blood removal rate sensor (111).