Aiming at the problem of insufficient universality and interoperability of products in the field of airborne store management,an open architecture model for airborne Store Management System (SMS) is proposed by analyzing and referring to relevant open architecture models in the field of avionics.The functional layer,hardware architecture,software architecture,functional entities,interface design and other elements related to the open architecture model are presented,as well as their design requirements.Analysis is made on the interoperability effects of three levels that can be achieved by implementing an open architecture model,providing top-level architecture support for the development of portable,reconfigurable, and multi-level interoperability airborne store management system.