Objective To explore the interaction patterns and behavior between master of nursing specialist (MNS) students and their supervisors based on the Theory of Communicative Action, and to provide references for establishing an effective communication mechanism that fosters a harmonious and symbiotic supervisor-student relationship. Methods A qualitative descriptive study was conducted. An interview outline was developed based on the Theory of Communicative Action, then 16 MNS students were purpo-sively selected for semi-structured in-depth interviews. Data were analyzed using directed qualitative content analysis to identify themes. Results Five themes were extracted:diversified supervisor-student interactions, forms of interactive communication, roles of different actors within these interactions, effectiveness of the interactions, and expectations for the supervisor-student interactions. Conclusion The interactions between MNS students and their supervisors are complex and occur across diverse contexts. There is a need to improve the clarity of responsibilities and the effectiveness of the interactions. Harmonious supervisor-student interaction can be achieved by creating interactive environments, optimizing management and support mechanisms, and enhancing empathetic engagement.