This comprehensive review explores the latest advancements in electrochemical methods for detecting formaldehyde, a ubiquitous indoor air pollutant with significant environmental and health implications. The review highlights the advantages of electrochemical techniques, such as high sensitivity, selectivity, and real-time analysis capabilities, making them highly effective for formaldehyde monitoring. It delves into the fundamental principles, mechanisms, and diverse methodologies employed in electrochemical formaldehyde detection, emphasizing the role of innovative sensing materials and electrodes. Special attention is given to recent developments in nanotechnology and sensor design, which significantly enhance the sensitivity and selectivity of these detection systems. The review also identifies current challenges and discusses future research directions, aiming to encourage ongoing research and innovation in this field to develop advanced, practical solutions for formaldehyde detection in various environmental and biological contexts.This comprehensive review explores the latest advancements in electrochemical methods for detecting formaldehyde, a ubiquitous indoor air pollutant with significant environmental and health implications. The review highlights the advantages of electrochemical techniques, such as high sensitivity, selectivity, and real-time analysis capabilities, making them highly effective for formaldehyde monitoring. It delves into the fundamental principles, mechanisms, and diverse methodologies employed in electrochemical formaldehyde detection, emphasizing the role of innovative sensing materials and electrodes. Special attention is given to recent developments in nanotechnology and sensor design, which significantly enhance the sensitivity and selectivity of these detection systems. The review also identifies current challenges and discusses future research directions, aiming to encourage ongoing research and innovation in this field to develop advanced, practical solutions for formaldehyde detection in various environmental and biological contexts.