This book is regarding the optimization of AVR system with the help of biomimetic techniques and a novel method can be used by combining two such techniques. This work deals with the tuning of PID controllers of AVR system using PSO and BSO (biomimetic optimization algorithms). These strategies don't demand to satisfy the necessity of differentiability, convexity and alternative conditions for mathematical description of the matter. Owing to the issues simply with basic mathematical operations, therefore, they are easy and simple to be enforced on computer.