Scores of College Entrance Examination and that of Achievement Test of First-year College Calculus Students. The study was aimed to:(1) explore the correlation of Mathematics scores on the college Entrance Examination (CEE) and the freshmen Caculus achievements; (2) examine if there are any significant differences on math thinking and computation ability after they learned the Caculus course for one year; (3) distinguish the Math thinking and computation ability of those graduated from the public senior high schools from those graduated from the private ones. The subjects were 146 freshmen from Science & Engineeing Colleges at three national universities in Taiwan. The study instruments were the measurement of Caculus, the test of Math thinking ability and the test of Math computation ability. The statistic methods used to examine the hypothesises were: Pearson-productive correlation, T-test, ANCOVA, and regression correlation. The findings were the following: (1) The correlation on the Math scores of CEE and the Caculus achievements is significant. The coefficece is 0.2969. (2) The main content in the Math test of the CEE covered the evaluation of Math thinking and computation ability. (3) After learning the Caculas course for one year, the Math thinking and computation ability of the subjects have been improved. (4) There is no significant difference on Math thinknig and computation ability between those who graduated from the public and private high schools. However, within the private students group, there is not very much progress on their computation ability. Some implications of the findings and suggestions for further research were presented: (1) To improve the test contents of the CEE and the procedures to select college students. (2) To select suitable subject matters for college freshmen Calculus and to explore more effective teaching methods.