In this paper, based on Bloom's Taxonomy and Double Diamond Model, this study explores to development of the Graphic Design Thinking Model, which involves the knowledge dimension and the cognitive dimension, and it will be used to improve creative thinking for solving problems in relevant design courses. To test this hypothesis, the researcher will measure the effectiveness of this model used in the implementation of design projects and compare the improvement of various indicators of creative thinking. The respondents are 30 students from one university in China majoring in art and design, who were asked to take a pre-test, and a post-test according to the GDT Model in the graphic design course. The researcher has referred to the Torrance Tests of Creative Thinking (TTCT) and used a Likert scale to determine the pre-test and post-test scores in the design projects. The results analyzed by SPSS show that the GDT Model can help students to realize the creation of graphics, significantly improving their creative thinking.   Received: 15 December 2022 / Accepted: 26 February 2023 / Published: 5 March 2023