A mobile sensing and payment method and system for parking fees is disclosed. The system includes an array of identity information collection modules in a parking facility. A background data processor collects mobile terminal identification information from a mobile terminal of a person entering the parking facility while the mobile terminal performs cell reselection. The data processor simultaneously senses transmission intensity of the mobile terminal using the terminal identity information collection modules. The data processor determines a location of the mobile terminal based upon the changes in the signal transmission intensity from the collection modules. The data processor generates a specific characteristic threshold for the mobile terminal to pass an entrance gate. The data processor causes the entrance gate to be opened records a specific time that the entrance gate is opened. The data processor records a specific time that the person has entered the parking facility.