Feedback control theory has been widely used in many fields; this paper introduces this theory into a model for a pedestrian navigation system. Based on the model, several feedback channels are designed and analysed using control theory. The pedestrian is not only a data receiver but also a data collector. All collected information is stored in a temporal database and can be used for spatial-temporal analysis. At the same time, feedback control theory can integrate all modules of the system as whole, which can help to improve the overall effectiveness. Based on information fed back and feedback control theory, the pedestrian navigation system will help users to "see more, understand better, and decide more quickly."