This book chapter provides a comprehensive exploration of transduction methods used in modern Micro/Nano devices, elucidating their fundamental principles, applications usage, and technological challenges. The chapter begins with a solid-state model of a transducer, offering insights into the transformation between mechanical and electrical domains. Various transduction techniques for actuation, including electrostatic, electro-thermal, electromagnetic, piezoelectric, and optical are then explained. Following this, sensing techniques, including capacitive, piezo-resistive, resonant, etc., are systematically presented. The chapter concludes with an outlook on potential advancements and broader insights, emphasizing the ongoing research endeavors to refine existing techniques and explore new materials, paving the way for enhanced performance in diverse applications.