The purpose of this research is to study the influence of implementing 9-year compulsory curriculum on students¡¦ mathematical abilities, and to analyze the achievement of students from backgrounds of different educational beliefs and learning practices. Based on this concept, a questionnaire is designed based on papers published both locally and internationally together with analysis of survey results. This study is based on the population of junior high school students graduated during 2003 and 2004 in Kaohsiung City. The method of stratified random sampling is employed to select schools for conducting the survey. A total of 5 schools were selected and 450 sets of questionnaire taken from these schools with 400 successful returns. A total of 16 questionnaires were considered ineffective and 386 were valid returns. The mean, maximum, minimum, and standard deviation of the collected data were analyzed while statistical methods such as equality of means were employed in terms of the heteroschendasticity. The methods of regression analysis and data processing were used to inspect the following questions: