To study the intelligent home control system for Internet of Things under the conditions of data security and shielding protection， user intelligent terminal control， remote access of private cloud disk and automatic alarm for abnormal state， the home control circuit is redesigned and improved in combination with the characteristics of sensor network system， single chip microcomputer， intelligent gateway， router， NAS server and other components， and a new home network mode is developed. The relevant control objects are designed as an integrated device control cluster with simple control and network service function. The data management center of low-power NAS server is introduced， which changes the traditional mode of remote storage of data in smart home relying on public cloud disk. Experiments show that the system enhances the system synchronization ability between control objects based on traditional smart home， greatly improves the speed and security of home data management， and the sensor network also presets the alarm mechanism under abnormal conditions. The voice control system also meets the terminal management needs of different age groups.