Meta models and meta-modeling are becoming popular as one of techniques in the main steam of software develop ment

resulting from the fact that general modeling languages such as UML become ubiquitous.Firstly

this paper analyzes the features of meta model architecture and corresponding requirements

including especially meta model assessment

of managing meta information.Taking OMG's four level meta model architecture as an example

UML meta model

as the core part of the architecture

is the focus of debating among researchers and practitioners.The situation proves the necessity of UML meta models measurement.The hall marks in terms of meta and OO metrics provide the feasibility of the evaluation.Secondly

a quantitative method

measuring the stability from the internal perspective and design quality from external perspective

is applied to assess 5 UML meta models.The results of the assessment are then analyzed in comparison with related subjective comments on UML evolution.The promising application of the method is presented as a conclusion.