In contemporary world,ASEAN is facing new changes in its internal and external envi-ronment,and the competitive potential of the major powers continues to increase.ASEAN remains steadfast in its commitment to fostering an inclusive regional order,and this commit-ment is showing positive growth in Southeast Asia.Looking at the historical evolution of re-gional order construction in Southeast Asia,ASEAN has evolved from a passive participant to an active architect,shaping the spatial structure and theoretical framework of what is now re-ferred to as the"ASEAN Cosmos".The emergence of the"ASEAN Cosmos"does not come out of nowhere,nor is it the result of pure spontaneity on the part of ASEAN,but rather re-presents a nuanced and complex synthesis across three dimensions:the interactions among ASEAN member states,the relations between ASEAN and the major powers,and the broader engagement between ASEAN and the world.The"ASEAN Cosmos"originates from ASEAN's reflections on the internal and external world at the cognitive level,and from the logic of ASEAN's experience in interactions among ASEAN countries and with the world at the practical level.The"ASEAN Cosmos"is not a single static concept,but a collection of dynamic concepts,that demonstrate the process of building a trans-regional global network created by ASEAN at the macro level,presenting a dynamic conceptual map of Southeast Asia in world politics,and providing an opportunity for the"Global South"to participate in the construction of the international order.