Purpose: This research aims to explore the potential of alternative development philosophy through the concept of Interbeing and apply this to international development cooperation to suggest a new direction. Originality: This research contributes to the self-reflection of Korean international development cooperation and proposes a new development model that addresses the limitations of existing development models. Methodology: This research conducts a comparative analysis of the philosophical concepts of Interbeing as articulated by Lee Ki-Sang and Martin Buber. It aims to establish a clear definition of the concept of Interbeing philosophy and apply it to the field of international development cooperation. Result: This research identifies the key characteristics of the Interbeing philosophy as multi-layered interactions, relational self, harmony, and mutual dependency. These elements underscore the necessity of incorporating the Interbeing philosophy into international development cooperation. Conclusion and Implication: This research concludes with an alternative development approach through the philosophy of Interbeing. This approach emphasizes harmonious relationships between humans and nature, as well as between humans themselves, aiming for sustainable development that overcomes the limitations of existing development models.