The invention relates to the technical field of communication, which can effectively reduce line congestion and improve communication efficiency. The invention relates to an optimal base station communication method of an electronic price tag system, comprising the following steps: 1) an administrator distributes tasks to a designated price tag in the background; 2) according to heartbeat signalssent by each base station, the background judges whether any base station is executing other designated price tag tasks; 3) if a base station is executing other tasks of that designate price tag and the task queue is not full, the base station is regarded as the optimal base station, and the background sends the tasks of the designate price tag to the base station; if no base station is executingtasks of other designated price tags, or the base station is executing tasks of other designated price tags but the task queue is full, the background selects the optimal base station from all the base stations whose task queues are not full, and sends the tasks of the designated price tags to the optimal base station; 4) the optimal base station distributes the task to the designated price tag, and the designate price tag changes the display content according to the task information, and the communication ends.