This study aimed to identify irrational thoughts that are common among students of the Colleges of Applied Sciences and define anxiety feeling level among them. The study also aimed to identify the statistically significant differences between spreading of irrational thoughts and level of social anxiety based on two variables (Gender and Specialization). The number of students included in the study was (4568). Then a smaller sample of (282) student, (115) male student and (167) female student, was selected for the study. The connective descriptive syllabus has been used in the study. A tool has been developed to measure irrational thoughts and another tool to measure social phobia. The two tools credibility has been checked through arbitration method, as the stability of them has been estimated based on Cronbach's alpha. Results showed that the two had acceptable credibility and stability coefficients for the purpose of the study. The results showed that the prevalence of irrational thoughts between students of the Colleges of Applied Sciences was medium. The averages ranged between (3.51) for seeking personal perfectionist, (2.88) for predicting disasters, and (3.2) for all other irrational thoughts. The average of prevalence of social phobia among students was (2.75) for fear of negative evaluation, (2.48) for talking with others and (2.67) for all other kinds of social phobia. According to س gender variable and specialization variable there were being no statistically significant differences in the irrational thoughts measurement .The level of significance reached (0.99) which showed no statistical significance impact of both gender and specialization variables on irrational thoughts. The results also showed that there were being statistically significance differences according to both gender and specialization variables for social phobia measurement. The level of significance reached (0.81) which showed no statistical significance impact of both gender and specialization variables on social phobia.