The invention discloses a grading prediction method and a grading
prediction system. The grading prediction method comprises the steps of acquiring historical comment data, constructing a subject term distribution table by virtue of a method based on word vectors, counting comment character representation of an appointed user to a first object according to the subject term distribution table, simultaneously, acquiring historical grading data, counting a correction average
score of the appointed user to a first object as one of the characteristics, counting the weight and the error offset of each characteristic by taking the correction average
score and a subject characteristic as the characteristics of a
linear regression model, firstly counting the comment character representation and the correction average
score of a second user to a second object aiming at the to-be-predicted score of the second user to the second object, and acquiring the score of the second user to the second object by combining the subject weight with the error offset. According to the grading prediction method, the subject term table is constructed by virtue of a term
vector method, is predicted and scored according to comment contents and is simultaneously considered from the angles of the users and the objects, and a combined recommend model is obtained by virtue of a
collaborative filtering method, so that a prediction result is relatively accurate comprehensive.