*Abstract:* Introduction: Despite the frequent occurrence of emotion polyregulation in everyday life, e.g., the combination of different emotion regulation approaches within one regulatory episode, it is unclear which regulatory strategies individuals tend to use together in different contexts and how effective these combinations are. This ecological momentary assessment study examines emotion polyregulation and its success in contexts of (1) downregulation, (2) upregulation, and (3) maintenance goals. Method: 321 adults (76.95% female; mean age: /M /= 30.79, /SD /= 8.97) reported on the endorsement and success of 15 different emotion regulation strategies five times a day for seven days. Multi-level structural equation modeling was used to model dimensions of emotion polyregulation and their success. Results: For downregulation contexts four emotion polyregulation dimensions were found: /Situation Modification, Repetitive Processing, Emotional Avoidance /and/Interpersonal Regulation/. In contrast, three-factor models characterized emotion polyregulation for upregulation (/Emotional Acceptance, Repetitive Processing /and/Interpersonal Regulation/)/,/ and maintenance goals (/Unspecific Regulation, Emotional Acceptance /and/Interpersonal Regulation/). Moreover, the success of emotion polyregulation was goal-dependent. Conclusion: These findings enhance our understanding of everyday life emotion regulation and emphasize the need for more research on emotion polyregulation and its contextual variations.