Appraisal is an important stage in the preparation of Public-Private Partnership projects, which has an important influence on the project investment decision. However, the reality of the appraisal work over the past time has not been as effective as expected. To improve this situation, first of all, it is necessary to improve the legal basis of the organization, operation as well as the responsibility of the subject assigned to the appraisal task (the appraisal council). Only when the legal status of the appraisal council is independently designed, the composition of the appraisal council meets the professional requirements and the legal responsibility of each member of the appraisal council are clearly defined, thus the appraisal work can be done seriously and effectively. With the above orientation, this article will clarify Vietnamese legal regulations related to the appraisal council for Public-Private Partnership projects, including the current provisions of Decree 63/2018/ND-CP and the upcoming provisions of the Law on Public-Private Partnership Investment 2020. At the same time, this article will also compare with similar provisions of the Korean laws to have multidimensional views. On that basis, this article will propose a number of personal views to complete the legal basis for the appraisal of Public-Private Partnership projects in our country.