Fuente: Wipo "IOT" The present invention relates to a blockchain-based Internet of Things data transmission method including: a step of generating encrypted IoT data corresponding to IoT data using a first public key of an IoT device and sensor, a second public key of an IoT gateway, and a third public key of a base station in a case where the IoT data collected at the IoT device and sensor is to be transmitted; a step of performing 1-1st decryption with a second private key of the IoT gateway in a case where the encrypted IoT data is transmitted to the IoT gateway; a step of transmitting first decryption IoT data from the IoT gateway to the base station in a case where the decryption at the IoT gateway is valid; a step of acquiring the IoT data by receiving the first decryption IoT data at the base station and performing 1-2nd decryption with a third private key of the base station; and a step of performing blockchain-based storage at an edge server in a case where the IoT data acquired through the base station is received at the edge server. According to the present invention, data security can be enhanced in the Internet of Things (IoT). COPYRIGHT KIPO 2021