As a long-established and huge industry, the automotive industry needs to follow the era of Industry 4.0 and embark on the path of automation and digital transformation. The impact of adoption of these technologies into automotive production lines, especially from a systems view, however, remain unknown. The main objective of this research is to design a conceptual model of an automated feeding and fastening system applied in an automotive final assembly line by utilising system dynamics methodology whilst considering aspects such as production capacity, cost and profits. This research includes a literature research of automotive assembly lines, the principles of automated feed pickup and fastening, and human-machine collaboration; the conceptual design of the system; and the construction and simulation of the system dynamics model, and the analysis of the simulation results was carried out in order to draw conclusions. Simulation results show that the application of such automation systems can indeed increase the production capacity, reduce the operating costs, and increase the profits.