Objective To conduct a scoping review of studies on the application of Ecological Momentary Assessment (EMA) in patients with eating disorders, so as to provide a reference for clinical medical staff to conduct assessment and management of eating disorder behaviors. Methods Using the scoping review guidelines as the methodological framework, a systematic search was conducted in domestic and international databases for studies on the application of EMA in patients with eating disorders.The search pe-riod was from the establishment of the database to July 23, 2025. Results A total of 26 studies were included and thematic synthesis was conducted from four aspects: research objectives, research design (application formats, schedule characteristics), application outcomes (outcome indicators, response rates, research findings), and current existing limitations. Conclusion EMA demonstrates significant application value in patients with eating disorders, and it can be used to dynamically assess the impacts of emotions, cognition, and environment on the disorder.Future research should further optimize research designs and data platforms to facilitate the development of precision management protocols for patients with eating disorders.