The present invention discloses a control method of an Internet-of-things device based on a blockchain. The method is employed in a blockchain established in a consensus network, an Internet-of-thingsdevice performs Broker registration for expansion, the Broker is configured to write the information into the blockchain, and each participation node commonly maintain the device information recordedin the blockchain; a mobile phone client (APP) and the device establish connection to the common Broker through an Internet protocol after registration, and the APP and the Internet-of-things deviceperform real-time communication according to the Internet protocol through the common Broker; and the device and the APP perform synchronization of part of data through CDN, and the information themselves are written into the blockchain through the connected Broker.