A band usage information generating and reporting method, a charging method, an eNB, a CN, a MME and a UE are disclosed. The eNB and the UE can generate band usage information for charging (S301), and report the band usage information to the CN(S302), wherein the band usage information involves band usage of at least a first band and a second band, and traffic is assigned to respective bands by the eNB. The Counting entity at the eNB or UE can count the data volume of each band or ratio of data volume via different bands as the band usage information based on the scheduling information of the data. The Charging system located in the CN can process the charging and generate a bill according to the reported band usage information.