The purpose of the study is to confirm the differences in thought-action fusion(TAF), neutralizing actions and deficiency of thought suppression among the types of obsession. To this end, Padua Inventory-Washington State University Revision(PI-WSUR), Thought-Action Fusion Scale-Revised(TAFS-R), Copying for Intrusive Thoughts Questionnaire(CITQ) and Thought Suppression Inventory(TSI) were conducted with 471 college students, and the following are the results of the study. The groups of high obsession experienced more of morality TAF, likelihood-other TAF and likelihood-self TAF, which are the three elements of TAF, than the groups of low obsession. They also experienced more of intrusive thoughts and attempted thought suppression among the three elements of thought suppression, which are intrusive thoughts, successful suppression and attempted thought suppression. When autogenous obsession groups and reactive obsession groups were divided, the results different than expected were obtained in the differences in TAF, neutralizing actions and deficiency of thought suppression. In detail, the groups with high autogenous obsession experienced more of likelihood TAF than the groups with low autogenous obsession. The groups with high reactive obsession experienced more of morality TAF than the groups with low reactive obsession. In regards to neutralizing actions, reactive obsession groups(low autogenous-high reactive groups) used avoidant neutralizing actions the most when it came to autogenous obsessive conditions, and autogenous obsession groups(high autogenous-low reactive groups) came after the reactive obsession groups when using avoidant neutralizing actions. The groups with high autogenous obsession showed no significant effects in the rest of the conditions. The groups with high reactive obsession used more of direct neutralizing actions than the groups with low reactive obsession when it came to autogenous obsessive conditions. With regards to reactive obsessive conditions, they more used both avoidant and direct neutralizing actions. Lastly, intrusive thoughts in thought suppression occurred the most in the groups of high obsession(high autogenous-high reactive groups). If groups had high autogenous obsession or high reactive obsession, they experienced more of attempted thought suppression than the lower groups. When it came to successful suppression, the groups with high autogenous obsession experienced more difficulties in suppression compared to the groups with low autogenous obsession. Based on these results, the meanings and suggestions that the study provides as well as the direction of the future study were discussed.