This article tried to contribute Automatic Passenger Counting (APC) in the public transport system that is rapidly developing and collecting a lot of interest. Passenger counting is an important issue not only in public transport, and it is widely being used in the malls, public events, and many other places for the purpose of data collection, analyzing, marketing, and planning as well. Currently, most developed and developing countries are starting to pay attention to the concept of the Sustainable Public Transport System. This is a very huge and complex system; hence APC forms small pieces but is necessary. The basic method that is commonly used is IC card information. However, it cannot give satisfying results to consumers due to fare dodgers and human unconscious actions. In addition, there is a manual counting method that was being used in the first but not reliable method. Even, most suggested methods are showing high-performance results of their methods, they still have unresolved tasks. By analyzing the studied methods through their historical development, we generally categorized all methods and suggested indicators to evaluate them. Moreover, we concluded the evaluation with the suggested method.