With the continuous advancement in medical device technology, minimally invasive surgery has become the cornerstone of modern surgical practices. At the forefront of this evolution is the fusion of medical endoscopes with high-frequency electrosurgical instruments, now a mainstream approach in minimally invasive surgeries, driving the development of innovative surgical procedures. This paper aims to provide an in-depth understanding of the principles of electrosurgical units, with a particular focus on standard procedures in gastrointestinal endoscopic electrosurgery. The goal of this review is to provide a more profound and comprehensive insight into endoscopic electrosurgery for medical practitioners and patients. Through the comprehensive study, it is anticipated to serve as a guide and reference for improving surgical outcomes, reducing patient discomfort, and simplifying the tasks of healthcare professionals.