This study was making a thorough inquiry about the relationship between export supplier’s ability, export performance and quality audit notarization of the testing services in Taiwan areas. For questionnaire survey, there were 500 questionnaires in total were issued, 492 questionnaires were available and 8 questionnairs were unavailable, the effective recovery rate of 98.4%. analysis data was used according to narrative statistics, reliability and validity analysis, factor analysis, single factor analysis of variance, correlation analysis, difference analysis, regression analysis and the other analyzing methods. The final research results were as followings: (1) Export supplier’s ability and export performance had a significant positive correlation. (2) Quality audit notarization of the testing services and export performance had a significant positive correlation. (3) Quality audit notarization of the testing services had the effect of mediation with export supplier’s ability and export performance. (4) Different demographics had a part of significant difference among supplier’s ability, export performance and quality audit notarization of the testing services. Finally, according to the results of this study, recommendations for future research were noticed and advised.