Human error is a crucial problem in manufacturing industries. Due to the misinterpretation of information on interface system design, accidents or death may occur at workplace. Lack of human cognition criteria in interface system design is also one of the contributions to the failure in using the system effectively. Therefore, this paper describes stages of evaluation process on powder handling system prototype. In the study, the prototype was evaluated based on cognitive awareness criteria for interface system design: perception, comprehension, and projection. Five experts with more than five years of experience from engineering and information technology fields were involved in the evaluation process. Results in this study are essential to the researcher in order to improve powder handling system prototype. It is hoped that mapping up the cognitive awareness criteria in interface system design will help users to make better decisions while handling the system at the workplace.