The invention relates to a method and a system for quantitatively analyzing a knowledge point. The system comprises a first knowledge point weight setting module, a second knowledge point weight setting module, a knowledge point standard score calculation module and a knowledge point estimating score calculation module, wherein the first knowledge point weight setting module is used for setting the weight of each knowledge point occupying the content of test questions; the second knowledge point weight setting module is used for setting the source weight of each knowledge point; the knowledge point standard score calculation module is used for calculating the standard score of each knowledge point; the knowledge point estimating score calculation module is used for calculating the knowledge point grasping condition of a student who is evaluated. The knowledge point standard score obtained by the student is calculated through the set knowledge point weight and by combining the answering result of the student, the knowledge point estimating score of the student is calculated, and an analyzing result which objectively reflects the knowledge point grasping condition of the student is obtained. Teaching quality of an education administration institution, a school and a teacher is improved under the assistance of the method and the system, and the student can better grasp the knowledge point.