The invention discloses a scheduling method, device and system. The system comprises at least one access gateway device used for providing a scheduling port, at least one mobile scheduling terminal connected with the corresponding access gateway device and used for scheduling a communication terminal in communication relation with the access gateway device through the access gateway device to achieve a communication function. The communication function includes SIP telephone, audio and video call, voice broadcasting and communication monitoring. By means of the scheduling method, device and system, the problem in the relative prior art that power scheduling system usability is poor is solved, and the effect of an efficient convenient power scheduling system can be achieved.