The evaluation principles of developmental evaluation include developmental principle, incentive principle, cooperative principle, integrity principle and diversity principle.

1. Developmental evaluation is based on certain training objectives, which indicate the development direction of the appraisee and form the basis of evaluation. These goals mainly come from curriculum standards.

2. Pay attention to the diagnostic function of evaluation: the fundamental purpose of developmental evaluation is to promote the progress of the evaluated. In the process of evaluation, the description and identification of the present situation, development characteristics and development level of the evaluated object must be recognized by both the evaluator and the evaluated.

3. Highlight the evaluation process: Developmental evaluation emphasizes the collection and preservation of key materials that can show the development of the appraisee, and the presentation and analysis of these materials can form an understanding of the development and change process of the appraisee.