Internet of Things data transmission method and device

The invention discloses an Internet of Things data transmission method, the method is applied to a source node, and the method comprises the steps that node information of at least one intermediate node is acquired, and the intermediate node is used for constructing a data transmission path from the source node to a target node; determining a target intermediate node from the at least one intermediate node according to the data volume of the to-be-transmitted data, the node information of the intermediate nodes and a preset transmission cost calculation model, wherein the target intermediate node is the intermediate node with the lowest transmission cost; and transmitting the to-be-transmitted data to a target node based on the target intermediate node. Therefore, according to the embodiment of the invention, the intermediate node with the lowest data transmission cost can be obtained by utilizing the preset transmission cost calculation model, and data transmission is carried out by utilizing the intermediat