The invention discloses a method for transmitting control information of a multimedia broadcast multicast service (MBMS). A network side device indicates to a UE (User Equipment) the mapping information between information of each area and each MCCH (Multicast control channel), and the network side device may also indicate the area information of each MBMS to the UE, or the UE obtains the area information of the MBMS in a preset way; such, when the UE needs to receive a certain MBMS, the UE obtains the MCCH corresponding to the area information of the MBMS according to the area information of the MBMS and the mapping relationship between information of each area and each MCCH, and receives the configuration information of the MBMS in the MCCH. The invention also discloses a system and device for transmitting control information of a MBMS.