It is very important to evaluate the condition of bushings which always have a higher incidence of faults than the power transformers itself. This paper has proposed a condition assessment method for transformer bushings with matter element analysis theory. On the base of preventive experiments

including checking records and maintenance history

a layered evaluation indices system is built. Weight of each index has been calculated by analytic hierarchy process（AHP）

and the constant weights of test indices are modified using information entropy idea method based on the deviation of actual datum and normal state. With matter element theory the evaluation matter element for bushings has been built. Considering the error from measurement disturbance of quantitative indices and subjective judgment of qualitative indices

the index data is extended to an interval. Basing on interval extension theory

a matter-element model for bushings’ condition assessment is built. The examples show that

the condition assessment model for bushings based on matter element analysis can synthesize multiple attributes and get a reasonable evaluation

as well as provide a reference for condition-based maintenance.