This study aims to explore the correlation between successful intelligence and its relation to positive thinking and achievement motivation with A'Sharqiyah University students in Sultanate of Oman. The researcher followed the correlational descriptive approach, using the Successful Intelligence Scale, the Positive Thinking Scale, and the Achievement Motivation Scale. The sample of the study consisted of (419) males and females' students from different faculties, different years of studies and different GPA. The candidates were randomly chosen. The results of the study showed that successful intelligence, positive thinking and achievement motivation are significantly high with the A'Sharqiyah University students. The results also confirmed that there is a positive correlative relation between the dimensions of successful intelligence (analytical. Creative and pragmatic) and positive thinking and achievement motivation. The dimensions of successful intelligence assisted in explaining (40%) of the variance in positive thinking and (46%) in the variance in achievement motivation. On one hand, there is no statistical significance of positive thinking and achievement motivation based on the gender of the students. On the other hand, there is a statistical significance correlation on successful intelligence based on the students' major subjects (science or human studies) in favour to the science subject (with a slight impact). Furthermore, there is no significant correlation between positive thinking and achievement motivation based on the major. There is a significant correlation between positive thinking and achievement motivation based on the students GPA in favour of students with A, B grade (with slight impact). On one hand, there is no significant correlation of positive thinking and GPA. Based on the results of the study, the study suggested several important recommendations as follows: Provide training programmes and educational activities for human science students based on successful intelligence skills to enhance the ability to analyse, create and use practical application by connecting the theory with practice in addition to suggesting using the advanced measurement and scale of the study by researchers and interested educators due to its advanced psychometric features. Key words: Successful intelligence, Positive thinking, Achievement motivation