How to accurately assess student?s performance and learning activities online, to minimize a student?s temptation to cheat, and to discourage cheating and plagiarism? A valid, wieldy and reliable evaluating strategy is very important. The paper describes an evaluating strategy for student's assessment based on his portfolios, learning objects? Hierarchy and his learning procedure in e-learning. In addition, it analyses the scoring patterns varying as a function of the pragmatic import of student's score and alternative assessment techniques. Subsequently, It defines two functions as marks of student assessment by applying the usage model of Markov, learning objects? technology and alternative assessment techniques, which is on the basis of Learning Objects? Hierarchy and learning process. It also discusses the procedure of establishing evaluating model. At last, the paper probes into the new strategy?s application and evaluates its performance by comparing with the experimental results. It also analyses the problem of the evaluating strategy for student assessment.