The socio-food-flow system focuses on the structure of mental models, which can assist in recognizing social systems and human structures and determining their knowledge and views about the level of comprehension of the food-chain system. Qualitative methods like face-to-face and online interviews, cognitive mapping, and image interpretation create the mental model method. It also assisted using quantitative approaches to obtain more accurate and relevant data, such as questionnaires, so any researcher cannot challenge the results acquired. In addition, the researchers are carrying out a literature review over the next five years in Malaysia and abroad, from 2015 to 2020. As a result of the study's findings, most researchers prefer to discuss food-related research in food health and safety, while others prefer to discuss it in the context of food treatment technology. It is supported by the findings of previous studies conducted by researchers, in which researchers reviewed 10 journals from indexed sources such as science direct and Scopus from 2015 to 2020. This study could be used to remind the whole community of the relevance of the food chain system to improve product quality and reduce the environmental impact of production. Furthermore, the conceptual approach of the model can assist researchers in increasing public awareness of the relevance of the food chain system flow in Malaysia.

Keywords: Mental models, sustainability, food chain systems, knowledge and review literature