Methods and systems for charging rate management based on usage rate of charging stations for use in a server are provided. The charging field includes a plurality of electric vehicle charging stations for charging at least one electric vehicle. First, the server connects to each of the electric vehicle charging stations through the network to obtain a usage status of the respective electric vehicle charging station. Then, the server calculates a usage rate of the charging field according to the usage status of the respective electric vehicle charging station, and determines a charging rate for the charging field according to the usage rate.