Elevator system and firmware sending method

A main controller of the elevator system generates a transmission order for transmitting firmware images to a plurality of sub-controllers based on an operation state of an elevator, and transmits a data packet including the firmware images and the transmission order to the sub-controller with a preferential transmission order. The sub-controller with the priority transmission order receives the data packet from the main controller to update the firmware image, and transmits the data packet to the sub-controller with the second priority transmission order. 本发明的电梯系统所具有的主控制器基于电梯的运行状态来生成对多个副控制器发送固件映像的发送顺序，对于发送顺序优先的副控制器发送包括固件映像和发送顺序的数据包。发送顺序优先的副控制器从主控制器接收数据包来进行固件映像的更新，对发送顺序第二优先的副控制器发送数据包。