A method of controlling a plurality of cameras in a communication network is provided. The method includes: controlling a camera to receive and analyze information about an idle time of each of at least one other camera; according to the analyzing, controlling the camera to transmit at least one task and/or information about the at least one task to the at least one other camera, wherein the idle time of each of the at least one other camera is set to a time remaining before each of the at least one other camera is configured to execute a task among one or more tasks or a sum of time durations at which no tasks are allocated to each of the at least one other camera.