The purpose of this study is to determine experimentally whether the brainstorming method would effect on the creative (verbal) thinking ability of Korean University students. Experiments were conducted using university students selected by convenience sampling. The students groups were divided into two groups with the first group instructed under the streamlined brainstorming method and the second group under the integrated brainstorming method. The authors sought to analyze whether 1) the brainstorming method effected on the creative (verbal) thinking ability, and 2) differences, if any, between the effects of the integrated brainstorming method and streamlined brainstorming methods. Torrance Tests of Creative Thinking (Verbal) were administered before and after the experiments took place. Based on the results, it was concluded that more creative (verbal) thinking ability effect was observed in those who were trained by brainstorming method than in those who were not, and that the integrated brainstorming method was observed to be more effective than the streamlined method in terms of enhancing fluency, flexibility and originality as sub factors of creative (verbal) thinking ability.