Fecha de publicación: 20/04/2018 Fuente: Wipo "IOT" The invention discloses a cloud access method of an intelligent door lock. The method is implemented by the following devices of the intelligent door lock, a cloud server, a mobile terminal and an NB-IOT module, wherein the intelligent door lock accesses the cloud server via the NB-IOT module, the intelligent door lock is provided with an MCU which communicates with the NB-IOT module, the mobile terminal sends command data to the cloud server to operate the intelligent door lock, and the NB-IOT module comprises an IOT platform, an NB-IOT core network, an NB-IOT base station and an NB-IOT terminal. The method comprises a process that the intelligent door lock accesses the cloud server, including the steps as follows: the MCU penetrates through a network firewall to send a message to the IOTplatform; 2, the IOT platform receives the message sent by the MCU, and the IOT platform penetrates through the network firewall to send the message to the NB-IOT base station by using the NB-IOT core network; 3, after receiving the message, the NB-IOT base station sends the message to the NB-IOT terminal, and after receiving the message, the NB-IOT terminal sends the message to the cloud server.The method provided by the invention does not need a special home gateway and miscellaneous protocol conversion, and has the advantages of strong signal, wide coverage and low power consumption.