3 Methodology 3.1 Collaborative Filtering Mining Design As the calculation of similarity and the application of recommendation algorithm. As for the calculation of similarity, the calculation method of same similarity degree is adopted for the calculation of user similarity or project similarity. The common calculation idea is as follows: the weight values of project is expressed with N dimensional space vector, and then the distance and angle between the two space vector are measured through the method of algebra so as to indicate similarity [8]. Pearson correlation coefficient is one of the commonly-used similarity calculation methods based on correlation coefficient. In order to make the calculation accurate, it is usually necessary to find the users who evaluate [9].