The evaluation of science and technology achievements is directly related to its transformation, and the construction of a third-party evaluation index system for its achievements is an important prerequisite for its evaluation. The third party refers to a service organization with high business capabilities and evaluation qualifications, which is relatively more objective, independent and fair. The authors explore and analyzes the problems existing in the evaluation of science and technology achievements, and puts forward an effective strategy for the construction of a third-party evaluation index system for science and technology achievements, hoping to help the smooth development of its third-party evaluation.