Diabetes mellitus is a condition marked by unusually high blood glucose levels brought on by a lack of insulin. For patients with diabetes mellitus, the use of a continuous glucose monitor, insulin pump, and control algorithm offers an alternative to patient self-management of insulin doses. Automated closed-loop IIS has been studied for a very long time. In closed-loop systems, the control algorithm serves as the main mechanism for precise insulin administration. The primary objective of this project work is to control the blood glucose level of type 1 diabetic patient using a blood glucose level sensor and PID controller based on ANN Technology. The capacity to track a set point (70 mg/dL) from the beginning condition of hyperglycemias as well as in reaction to a meal disruption is suggested based on the result analysis.