This book deals with Turbulence and MHD Turbulence. The presentation of this book is straightforward and comprehensible by the learner also. Researchers who thoroughly study this book will be well prepared to make significant contributions to analyze Turbulence and MHD Turbulence. This book will assist the physicists, chemists, applied mathematicians, engineers, and environmentalist, who undertaking research on Turbulence. The book included a widespread bibliography.This book mainly expresses the decay of turbulence and MHD turbulence before the final period.