To realize the intelligent venous transfusion, a design utilizing infrared radiation technology has been proposed for an intelligent infusion speed monitoring alarm device based on single chip microcomputer. The design, with 51 series STC89C52 micro-controller as the main body, uses diode elements to convert the optical electrical signals. Based on a comparison with LM393 voltage comparator, and a processing of the signal by a single chip microcomputer, the light emitting diode and buzzer will sound an acousto-optic alarm. The results show that the design realizes the collection and display of the drop signal, with its ability to determine whether to sound an acousto-optic alarm according to the set of upper and lower limit infrared induction alarm time. This design helps to overcome the flaws of regulation of dripping speed and insufficient droplets, thus effectively avoiding untimely fluid infusion and reducing the burden on the families of patients and medical staff.