Design activity typically refers to a specific set of creative processes and tasks that work by the designers to improve a complex problem and usually provide a principal gateway to them. This process can be performed with the help of one or several people. However, recently the critical trend of co-creation in design has been instantly recognized as an undeniable approach that enhances the quality, speed, and precision of design and ideas. As the term "co-creation" It means creativity in team-working in which a team collaboration to solve a problem or valuable present a brilliant idea. Considering the importance of this issue in the academic environment, and due to the ill effects of this type of activity on learning and education, there has been considerable attention by individuals, especially students and researchers. Properly considering the theoretical foundations, this study seeks to explain this critical question, what endure the relationship between mental models and their impact on the tendency of industrial designers to team-working and progressively improve the design quality? This study was to investigate the cause and effect of the four mental models included: Goel-oriented, Unitarianism, Functionalism, and Stable-oriented on the tendency to industrial designers in team-working and cross-validation in the design workshop. This academic research is a correlation type of descriptive-analytic study. The statistical population was formed through a targeted sampling of all industrial design master students in all IRANIAN state universities between 2017 to 2019 and, also their bachelor's degree was in industrial design. Consequently, we designed mixing questionnaires, and 54 designers that had these study conditions were examined. The measurable results were analyzed by SPSS 21. Consistent findings of this study showed that among the four mental models, except for the Goal-oriented mental model with a significance level of 0/407, mental models of Unitarianism and Functionalism were significantly less than 0.05 in Team-working Students and they retained a direct relationship with them. Also, the Stable-oriented mental model with a correlation coefficient of 0/372 and a significant number of 0/006 at the level of 0/01 was significant and considered as the dominant model among the four mental models. In the second phase, the study was validated in a 7-day focus group design workshop on pre-training and post-training mental models in the form of a patient transfer device. Comparison of morphological analysis Results of pre-training and post-training designs concerning the short time of the workshop still indicated a notable qualitative difference. The results showed that by focusing on reinforcing the mental patterns of industrial designers, in addition to increasing the tendency to teamwork, the design quality could be more acceptable. The mental patterns and individual thoughts are also considered as effective factors in the formation of teamwork, especially among students. According to the results, academic managers and Teachers can concentrate on the mental models of Unitarianism, Functionalism, and Stable-oriented. This will increase collaboration between industrial design students and leads to an increase in professional industrial designers’ co-creation and their willingness to teamwork.