This paper describes design and implementation of a medical injection device providing sensitive flow control using mechatronics design method. With the ever-increasing demand for sensitive fluid flow control in medical designs, and as fluid flow control technology falls further behind, sensitive fluid flow control is becoming critically important to various medical fluid injection systems. So there is a need to design a medical injection system providing sensitive fluid flow control. To fulfill this purpose, mechatronics design method has been used. There is a synergy in the integration of mechanical, electrical, and computer systems with information systems for the design and manufacture of products and processes in mechatronics design method. After design process the prototype is a system reducing mistakes depending on human, carried out pre-determined operating range, as a central management by the LabVIEW-based. The experimental results of the prototype show that the system has provided the expected design targets.