A method for measuring Inter-Frequency/Inter-RAT (Radio Access Technology) in Multimedia Broadcast/Multicast Service (MBMS) includes: setting an Inter-Frequency/Inter-RAT measurement time to prevent Inter-Frequency/Inter-RAT measurement time from overlapping constantly the transmission time of MCCH information; performing Inter-Frequency/Inter-RAT measurement by a UE according to the Inter-Frequency/Inter-RAT measurement time. In the present invention, the Inter-Frequency/Inter-RAT measurement time can be prevented from overlapping constantly the time when UTRAN transmits the MCCH information, so that the problem that the UE cannot receive MCCH information during Inter-Frequency/Inter-RAT measurement time may be solved. In the invention, a measurement time setting device is also provided for implementing Inter-Frequency/Inter-RAT measurement in Multimedia Broadcast/Multicast Service.