Abstract:The strategy for overcoming Organizational Inertia is organizational change and innovation,the method is performance evaluations. In the previous research, evaluations were always set as control constant and were simply assumed as an objective, neutral, effective and accessible process. But practical experience shows there is evaluator inertia exists in organization which makes evaluations lose of the means as control constant, so that they fails to be tools of performance measurement and organizational change. Evaluator inertia makes problem of performance be covered up and leads to evaluation paradox. Experience in science and technology policy evaluation shows that evaluation paradox exists in the tripartite interactional progress of leader or decision makers, the evaluator and the evaluated.