In this paper, through by using the AHP (Analytic Hierarchy Process) method's basic theory analysis in online-teaching platform, analyzing ability of students' self-learning, and establishing the evaluation index system, according to expert criteria derived the value of influence factors. With it calculated every level index's weight by using the square root method, and implements the weight by given algorithm. Introducing the system of WLES-the self-learning Evaluation system into the online teaching platform has been applied, and constructs the online self-learning evaluation system model, timely evaluation of feedback for teachers to grasp the students learning targets and Learning Dynamic. The model is consisted by three Module, and have different functions.