The present invention discloses an apparatus and a method for controlling an amount of concurrent calls. The apparatus for controlling the amount of concurrent calls comprises a background processing module, a cooperation module and a core module, wherein the background processing module is arranged to provide an information configuration interface, configure a threshold for each of amounts of concurrent calls classified according to call characteristics, and send the threshold to the core module; the cooperation module is arranged to provide a variable for each of amounts of concurrent calls classified according to call characteristics and send the variable to the core module; and the core module is arranged to receive the threshold and the variable and control the cooperation module to release a current call when determining the variable is no less than the threshold. The present invention could limit the amount of concurrent calls corresponding to specific call characteristic under the threshold and thus improve the control of user calls.