The Purposes of the study was to verify "the integrative Model of Mathematical Learning Process for Junior High School Students". The subjects contained 80 eighth-grade students. The research instruments administered were "Metacognition Inventory", "Motivational Belief Inventory", "mathematics Tests", and "Mathematical Problem-solving Process Inventory", and the data was analyzed by LISREL. The results indicated that the observed data fitted the aforementioned theoretical model well. This means that the latent independent variable, "metacognition", may influence the two latent dependent variables, "motivational belief" and "mathematics word problem solving process", and in turn, the variable "motivational belief" may further influence the variable "mathematics word problem solving process".