This disclosure relates to the technical field of medical devices. Some embodiments provide an infusion system and a method for controlling a liquid flow rate of the infusion system, which can automatically adjusting the infusion flow rate according to the current physical condition of a patient. The infusion system comprises an infusion device and a monitoring device. The infusion device comprises an infusion tube for receiving liquid medicine from a liquid medicine container, and the infusion tube may be provided with an infusion flow rate regulating device for regulating the flow rate of the liquid medicine. The monitoring device may be configured for monitoring physiological parameters of the patient, and may control the infusion flow rate regulating device to regulate the flow rate of the liquid medicine according at least to the physiological parameter information of the patient.
