An application method of a communication terminal is disclosed, the communication terminal being applied to a smart home system based on IoT protocols. The application method includes: installing, by the communication terminal the IoT protocols, acquiring, by the communication terminal, a first message from a device of the smart home system; and comparing the first message against a preset message comparison table, and, when a match is found, acquiring a second message matching the first message, and further sending the second message by the preset mode. Thus, the communication terminal according to the disclosure can connect to the appliances of the smart home system based on IoT protocols, enabling the smart home system relying on the communication terminal, which can provide realtime information reporting. In addition, the smart home system provides a low cost, a wide coverage area and a high intelligence.