This paper consists of four parts. In the first part (II.
Term Cluster Query Expansion Model), we examine the
system structure and each module of the term cluster query
expansion model. In the second part (III. Procedure of Term
Cluster Query Expansion Model), some examples are given
to show the substantial procedure. Test collection,
experiment and evaluation of the procedures are provided in
part three (IV. Experiment and Evaluation). Finally in the
part four (V. Conclusion), we give a conclusion.