The invention provides a method for charging in a mobile network, which comprises the following: step one, a GGSN sends a certification request for certificating UE to a certification authorized charging server, and the certification authorized charging server receives and stores the certification request which carries with user identity information of the UE and the current wireless access technique types; step two, a home agent sends statistical charging information thereof and the user identity information of the UE to the certification authorized charging server, and the certification authorized charging server acquires the wireless access technique types corresponding to the user identity information of the UE, adds the wireless access technique types into the charging information, and sends the charging information to a charging net element; and step three, the charging net element acquires the current wireless access technique types of the UE and performs charging according to the wireless access technique types. With the charging net element, the current wireless access technique types of the UE can be identified so as to adopt different rates for charging, thus the charging can be achieved effectively.