A new method for meta system is presented which is based on object-oriented concepts. The entity-relationship (ER) data model lacks a generalization hierarchy of object types, something that the object-oriented data model provides. The basic construct of IOMS (Interactive Object-Oriented Meta System) is designed based on and extended from Smalltalk/V. IOMS has following advantages. 1) Non meta system application experts are able to use this system easily. 2) A user can append, delete, and update any specification-meta spec and instance spec, at any time. 3) The object-oriented methodology helps bridge the semantic gap between model and real-world